Retirement Benefits [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Pension Benefits Pension Plan [Member] Other Benefits Other Postretirement Benefits Plan [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Discount rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Expected long-term return on plan assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets Rate of compensation increase Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Accounting Policies [Abstract] Percentage of LIFO inventory Percentage of LIFO Inventory LIFO inventory amount LIFO Inventory Amount Income Tax Disclosure [Abstract] Schedule of Income (Loss) Before Income Taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Deferred Tax Asset and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Unrecognized Tax Benefits Roll Forward Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Corporate Debt Securities Domestic Corporate Debt Securities [Member] Lease Obligations Capital Lease Obligations [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 5.45% Notes due 2016 Notes 5.45% Due 2016 [Member] Notes 5.45% Due 2016 [Member] 1.50% Notes due 2016 Notes 1.50% Due 2016 [Member] Notes 1.50% Due 2016 [Member] 1.60% Notes due 2018 Notes 1.60% Due 2018 [Member] Notes 1.60% Due 2018 [Member] 4.125% Notes due 2020 Notes 4.125% Due 2020 [Member] Notes 4.125% Due 2020 [Member] 8.8% Debentures due 2021 Debentures 8.8% Due 2021 [Member] Debentures 8.8% Due 2021 [Member] 2.625% Notes due 2023 Notes 2.625% Due 2023 [Member] Notes 2.625% Due 2023 [Member] 3.20% Notes due 2025 Notes 3.20% Due 2025 [Member] Notes 3.20% Due 2025 [Member] 2.30% Notes due 2026 Notes 2.30% Due 2026 [Member] Notes 2.30% Due 2026 [Member] 7.2% Debentures due 2027 Debentures 7.2% Due 2027 [Member] Debentures 7.2% Due 2027 [Member] 3.375% Notes due 2046 Notes 3.375% Due 2046 [Member] Notes 3.375% Due 2046 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Total long-term debt Long-term Debt Net impact of interest rate swaps, debt issuance costs and unamortized debt discounts Debt Instrument, Impact of Derivatives, Unamortized Discount (Premium), and Debt Issuance Costs, Net Debt Instrument, Impact of Derivatives, Unamortized Discount (Premium), and Debt Issuance Costs, Net Less—current portion Long-term Debt, Current Maturities Long-term portion Long-term Debt, Excluding Current Maturities Valuation and Qualifying Accounts [Abstract] Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowance for Trade Receivables Allowance for Trade Receivables [Member] Valuation Allowance of Net Deferred Taxes Valuation Allowance of Deferred Tax Assets [Member] Inventory Obsolescence Reserve Inventory Valuation Reserve [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Movement in Valuation Allowances and Reserves [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Balance at Beginning of Period Valuation Allowances and Reserves, Balance Charged to Costs and Expenses Valuation Allowances and Reserves, Additions for Charges to Cost and Expense Charged to Other Accounts Valuation Allowances and Reserves, Additions for Charges to Other Accounts Deductions from Reserves Valuation Allowances and Reserves, Deductions Balance at End of Period Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] McLane Company, Inc. McLane Company, Inc. [Member] McLane Company, Inc. [Member] Target Corporation [Member] Target Corporation [Member] Target Corporation [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Accounts Receivable Accounts Receivable [Member] Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Concentration Risk, Percentage Concentration Risk, Percentage Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Other Income and Expenses [Abstract] Other (Income) Expense, Net Schedule of Other Nonoperating Income (Expense) [Table Text Block] Fair Value Disclosures [Abstract] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Foreign exchange contracts Foreign Exchange Contract [Member] Interest rate swap agreements Interest Rate Contract [Member] Deferred compensation derivatives Equity Swap [Member] Commodities futures and options Commodity Contract [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Quoted prices in active markets of identical assets (Level 1) Fair Value, Inputs, Level 1 [Member] Significant other observable inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Significant other unobservable inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Derivative asset Derivative Asset Derivative liability Derivative Liability Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common stock Hershey Common Stock [Member] Hershey Common Stock [Member] Class B common stock Common Class B [Member] Statement [Line Items] Statement [Line Items] Dividends paid per share (USD per share) Common Stock, Dividends, Per Share, Cash Paid Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Segment Reporting [Abstract] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States UNITED STATES Other Non-US [Member] Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Net sales Revenue, Net Long-lived assets Property, Plant and Equipment, Net Statement of Cash Flows [Abstract] Net income including noncontrolling interest Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Operating Activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Stock-based compensation expense Share-based Compensation Deferred income taxes Deferred Income Taxes and Tax Credits Impairment of goodwill, indefinite and long-lived assets (see Notes 3 and 7) Restructuring Costs and Asset Impairment Charges Loss on early extinguishment of debt (see Note 4) Gain (Loss) on Extinguishment of Debt Write-down of equity investments Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net Gain on settlement of SGM liability (see Note 2) Business Combination, Bargain Purchase, Gain Recognized, Amount Other Other Operating Activities, Cash Flow Statement Changes in assets and liabilities, net of business acquisitions and divestitures: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable—trade, net Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Accrued income taxes Increase (Decrease) in Accrued Taxes Payable Contributions to pension and other benefit plans Payment for Pension and Other Postretirement Benefits Other assets and liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing Activities Net Cash Provided by (Used in) Investing Activities [Abstract] Capital additions (including software) Payments to Acquire Property, Plant, and Equipment Proceeds from sales of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from sale of business Proceeds from Divestiture of Businesses Equity investments in tax credit qualifying partnerships Payments to Acquire Equity Method Investments Business acquisitions, net of cash and cash equivalents acquired Payments to Acquire Businesses, Net of Cash Acquired Sale of short-term investments Payments for (Proceeds from) Short-term Investments Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Net (decrease) increase in short-term debt Proceeds from (Repayments of) Short-term Debt Long-term borrowings Proceeds from Issuance of Long-term Debt Repayment of long-term debt Repayments of Long-term Debt Payment of SGM liability (see Note 2) Payments to Acquire Businesses, Gross Cash dividends paid Payments of Ordinary Dividends, Common Stock Repurchase of common stock Payments for Repurchase of Common Stock Exercise of stock options Proceeds from Stock Options Exercised Other Proceeds from (Payments for) Other Financing Activities Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, end of period Supplemental Disclosure Supplemental Cash Flow Information [Abstract] Interest paid (excluding loss on early extinguishment of debt in 2015) Interest Paid, Net Income taxes paid Income Taxes Paid, Net Discount rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Rate of increase in compensation levels Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Commitments and Contingencies Disclosure [Abstract] Purchase Obligations Covered by Purchase Agreements with Various Suppliers Future Maturity Schedule Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Schedule of Future Minimum Lease Payments for Capital Leases Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block] Future Minimum Payments under Non-Cancelable Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Goodwill [Table] Schedule of Goodwill [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments Operating Segments [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] North America North America Segment [Member] North America Segment [Member] International and Other International and Other Segment [Member] International and Other Segment [Member] Goodwill [Line Items] Goodwill [Line Items] Goodwill, gross Goodwill, Gross Accumulated impairment loss Goodwill, Impaired, Accumulated Impairment Loss Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill, beginning balance Goodwill Acquired during the period (see Note 2) Goodwill, Acquired During Period Foreign Currency Translation Goodwill, Foreign Currency Translation Gain (Loss) Goodwill, ending balance Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Corporate, Non-Segment Corporate, Non-Segment [Member] Segment Reconciling Items Segment Reconciling Items [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Net Sales Operating Income (Loss) Operating Income (Loss) Derivative, Gain (Loss) on Derivative, Net Derivative, Gain (Loss) on Derivative, Net Goodwill and long-lived asset impairment charges Goodwill and Intangible Asset Impairment Costs associated with business realignment activities Restructuring Charges Non-service related pension expense Pension Expense, Non-Service Related Pension Expense, Non-Service Related Acquisition and integration costs Business Combination, Integration Related Costs Interest expense, net Interest Income (Expense), Nonoperating, Net Other (income) expense, net Other Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Amplify Snack Brands, Inc. [Member] Amplify Snack Brands, Inc. [Member] Amplify Snack Brands, Inc. [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Line of Credit Line of Credit [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast Scenario, Forecast [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Business Combination, Consideration Transferred Business Combination, Consideration Transferred Business Combination, Consideration Transferred Pr Share of Common Stock Business Combination, Consideration Transferred, Per Share of Common Stock Business Combination, Consideration Transferred, Per Share of Common Stock Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Trademarks Trademarks [Member] Customer Relationships Customer Relationships [Member] Patents Patents [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Asset, Useful Life Finite-Lived Intangible Asset, Useful Life Schedule II - Valuation and Qualifying Accounts Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Machinery and Equipment Machinery and Equipment [Member] Building and Building Improvements Building and Building Improvements [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, plant and equipment, useful life Property, Plant and Equipment, Useful Life Assets under capital lease arrangements, net Capital Leased Assets, Net Capital Leased Assets, Net Depreciation Depreciation Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Performance and restricted stock units Performance Shares And Restricted Stock Units (RSU) [Member] Performance Shares And Restricted Stock Units (RSU) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Outstanding at beginning of year (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Performance assumption change (shares) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Performance Assumption Change The change in the number of shares under a share-based award plan other than a stock option plan due to a change in the performance assumptions. Vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Outstanding at end of year (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Outstanding at beginning of year (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted-average fair value at date of grant (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Performance assumption change Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Performance Assumption Change Weighted Average Grant Date Fair Value The weighted average fair value as of the grant date pertaining to a share-based award plan other than a stock option plan due to a change in the performance assumptions. Vested (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Outstanding at end of year (USD per share) Pension and Other Post-Retirement Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Income Taxes Income Tax Disclosure [Text Block] Income Tax Contingency [Table] Income Tax Contingency [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Partnerships Qualifying For Tax Credits Partnerships Qualifying For Tax Credits [Member] Partnerships Qualifying For Tax Credits [Member] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Tax Cuts and Jobs Act of 2017, change in tax rate, income tax expense Tax Cuts and Jobs Act of 2017, Net Impact Change in Tax Rate and Mandatory Tax on Unremitted Foreign Earnings, Income Tax Expense (Benefit) Tax Cuts and Jobs Act of 2017, Net Impact Change in Tax Rate and Mandatory Tax on Unremitted Foreign Earnings, Income Tax Expense (Benefit) Amount of unrecognized tax benefits that if recognized would affect the effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Net tax expense (benefit) for interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Accrued net interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Expected reduction in the liability for unrecognized tax benefits within the next 12 months Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Undistributed earnings of foreign subsidiaries Undistributed Earnings of Foreign Subsidiaries Investment tax credits and related tax depreciation benefits Income Tax Credits and Adjustments Write-down of equity investments in partnerships qualifying for historic tax credits Equity Method Investment, Other than Temporary Impairment Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Interest Rate Swap [Member] Interest Rate Swap [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated as Hedging Instrument Designated as Hedging Instrument [Member] Non-designated Hedges Not Designated as Hedging Instrument [Member] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash Flow Hedges Cash Flow Hedging [Member] Fair Value Hedging Fair Value Hedging [Member] Interest Expense Interest Expense [Member] Derivative [Line Items] Derivative [Line Items] Derivative, term of contract Derivative, Term of Contract Derivative, notional amount Derivative, Notional Amount Minimum length of time, hedged in cash flow hedge Minimum Length of Time Hedged in Cash Flow Hedge Minimum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Maximum length of time, hedged in cash flow hedge Maximum Length of Time Hedged in Cash Flow Hedge Increase (Decrease) in Derivative Assets and Liabilities Increase (Decrease) in Derivative Assets and Liabilities Cash flow hedge gain (loss) to be reclassified within twelve months Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months Fair value hedges, pre-tax benefit Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation [Table] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Inventories Inventories [Member] Unrecorded Unconditional Purchase Obligation [Line Items] Unrecorded Unconditional Purchase Obligation [Line Items] Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] 2018 Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months 2019 Unrecorded Unconditional Purchase Obligation, Due within Two Years 2020 Unrecorded Unconditional Purchase Obligation, Due within Three Years 2021 Unrecorded Unconditional Purchase Obligation, Due within Four Years 2022 Unrecorded Unconditional Purchase Obligation, Due within Five Years Segment Information Segment Reporting Disclosure [Text Block] Restructuring Plan [Axis] Restructuring Plan [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] Margin for Growth Program Margin for Growth Program [Member] Margin for Growth Program [Member] Shanghai Golden Monkey Food Joint Stock Co., Ltd. Shanghai Golden Monkey Food Joint Stock Co., Ltd. [Member] Shanghai Golden Monkey Food Joint Stock Co., Ltd. [Member] CHINA CHINA Goodwill and indefinite-lived intangible asset impairment charges Goodwill, Impairment Loss Purchase price allocation adjustments Goodwill, Purchase Accounting Adjustments Long-lived asset impairment charges Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) Goodwill Impairment of Intangible Assets (Excluding Goodwill) Impairment of Intangible Assets (Excluding Goodwill) Amortization expense Amortization of Intangible Assets 2018 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Five Deferred tax assets: Deferred Tax Assets, Net of Valuation Allowance [Abstract] Post-retirement benefit obligations Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits Accrued expenses and other reserves Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Derivative instruments Deferred Tax Assets, Derivative Instruments Pension Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Pensions Lease financing obligation Deferred Tax Asset, Leasing Arrangements Amount of deferred tax asset attributable to taxable temporary differences from leasing arrangements. Accrued trade promotion reserves Deferred Tax Asset Tax Deferred Expense Accrued Trade Promotion Reserves This element reflects the tax effect as of the balance sheet date of the amount of the estimated future tax effects arising from all other reserves, which can only be deducted for tax purposes when losses pertaining to such reserves are actually incurred. Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Capital loss carryforwards Deferred Tax Assets, Capital Loss Carryforwards Other Deferred Tax Assets, Other Gross deferred tax assets Deferred Tax Assets, Gross Valuation allowance Deferred Tax Assets, Valuation Allowance Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Property, plant and equipment, net Deferred Tax Liabilities, Property, Plant and Equipment Acquired intangibles Deferred Tax Liabilities, Intangible Assets Inventories Deferred Tax Liabilities, Inventory Pension Deferred Tax Liabilities, Deferred Expense, Compensation And Benefits, Pensions Deferred Tax Liabilities, Deferred Expense, Compensation And Benefits, Pensions Other Deferred Tax Liabilities, Other Total deferred tax liabilities Deferred Tax Liabilities, Gross Net deferred tax liabilities Deferred Tax Liabilities, Net Net deferred tax assets Deferred Tax Assets, Net Included in: Components of Deferred Tax Assets and Liabilities [Abstract] Non-current deferred tax assets, net Deferred Tax Assets, Net, Noncurrent Non-current deferred tax liabilities, net Deferred Tax Liabilities, Net, Noncurrent Equity [Abstract] Schedule of the Changes in the Outstanding Shares of Common Stock Schedule of Common Stock Outstanding Roll Forward [Table Text Block] Schedule of Activity Relating to the Noncontrolling Interest Schedule of Stockholders Equity [Table Text Block] Business Combinations [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] Mauna Loa Macadamia Nut Corporation Mauna Loa Macadamia Nut Corporation [Member] Mauna Loa Macadamia Nut Corporation [Member] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Loss on disposal of business Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Foreign Line of Credit Foreign Line of Credit [Member] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Commercial Paper Commercial Paper [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Line of credit facility, accordion feature increase limit Line Of Credit Facility, Accordion Feature Increase Limit Line Of Credit Facility, Accordion Feature Increase Limit Debt instrument, covenant, pre-tax income from operations to consolidated interest expense, minimum Debt Instrument, Covenant, Pre-tax Income From Operations To Consolidated Interest Expense, Minimum Debt Instrument, Covenant, Pre-tax Income From Operations To Consolidated Interest Expense, Minimum Short-term foreign bank loans against the lines of credit Line of Credit, Current Short-term debt Short-term Debt Short-term debt, weighted average interest rate Short-term Debt, Weighted Average Interest Rate, at Point in Time Maximum amount of short term borrowing outstanding Line of Credit Facility, Maximum Amount Outstanding During Period Extinguishment of Debt [Axis] Extinguishment of Debt [Axis] Extinguishment of Debt, Type [Domain] Extinguishment of Debt, Type [Domain] Repayments of Debt Repayments of Debt Interest rate, stated percentage Debt Instrument, Interest Rate, Stated Percentage Debt instrument, face amount Debt Instrument, Face Amount Proceeds from Issuance of Other Long-term Debt Proceeds from Issuance of Other Long-term Debt Debt instrument repurchase amount Debt Instrument, Repurchase Amount Extinguishment of debt amount Extinguishment of Debt, Amount Gain on fair value hedge ineffectiveness Gain on Fair Value Hedge Ineffectiveness Document And Entity Information [Abstract] Document Information [Table] Document Information [Table] Document Information [Line Items] Document Information [Line Items] Entity registrant name Entity Registrant Name Entity central index key Entity Central Index Key Current fiscal year end date Current Fiscal Year End Date Entity filer category Entity Filer Category Document type Document Type Document period end date Document Period End Date Document fiscal year focus Document Fiscal Year Focus Document fiscal period focus Document Fiscal Period Focus Amendment flag Amendment Flag Entity common stock, shares outstanding (shares) Entity Common Stock, Shares Outstanding Entity well-known seasoned issuer Entity Well-known Seasoned Issuer Entity voluntary filers Entity Voluntary Filers Entity current reporting status Entity Current Reporting Status Entity public float Entity Public Float Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] KRAVE Pure Foods, Inc. KRAVE Pure Foods, Inc. [Member] KRAVE Pure Foods, Inc. [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Other intangible assets Other Intangible Assets [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Payments of SGM liability (see Note 2) Maximum contingent consideration amount Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Fair value of the contingent consideration Business Combination, Contingent Consideration, Liability Payment of contingent consideration Payments for Previous Acquisition Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Hershey Trust Company Hershey Trust Company [Member] Hershey Trust Company [Member] Employee stock options Employee Stock Option [Member] Class of Stock [Line Items] Class of Stock [Line Items] Common stock, shares issued (shares) Common Stock, Shares, Issued Treasury stock, shares, beginning of the period (shares) Treasury Stock, Shares Treasury Stock, Shares [Roll Forward] Treasury Stock, Shares [Roll Forward] Treasury Stock, Shares [Roll Forward] Stock repurchases: Share Repurchase Program [Abstract] Share Repurchase Program [Abstract] Treasury Stock, Shares, Acquired Treasury Stock, Shares, Acquired Stock issuances: Stock Issued or Granted During Period, Share-based Compensation [Abstract] Stock issued during period, shares, share-based compensation (gross) Stock Issued During Period, Shares, Share-based Compensation, Gross Treasury stock, shares, end of the period (shares) Common stock, shares, outstanding (shares) Common Stock, Shares, Outstanding Projected benefit obligation Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation Accumulated benefit obligation Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation Fair value of plan assets Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Fair Value of Plan Assets Subsegments [Axis] Subsegments [Axis] Subsegments [Domain] Subsegments [Domain] Subsegments Consolidation Items [Axis] Subsegments Consolidation Items [Axis] Subsegments Consolidation Items [Domain] Subsegments Consolidation Items [Domain] Net Gain Loss On Commodity Derivative Positions Reclassified From Unallocated Derivative Gains Losses To Segment Income Net Gain Loss On Commodity Derivative Positions Reclassified From Unallocated Derivative Gains Losses To Segment Income The amount of gain (loss) from commodity derivative positions reclassified from unallocated derivative (gains) losses to segment income. Net Mark to Market Valuation of Certain Derivative Positions Recognized in Unallocated Derivative Gains Losses Net Mark to Market Valuation of Certain Derivative Positions Recognized in Unallocated Derivative (Gains) Losses Changes in the values of derivative positions that is recorded in unallocated derivative (gains)/losses FAIR VALUE MEASUREMENTS [Abstract] FAIR VALUE MEASUREMENTS [Abstract] Schedule of Assets and Liabilities Measured at Fair Value Fair Value Measurements, Nonrecurring [Table Text Block] Schedule of Fair Values and Carrying Values of Long-Term Debt Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Pre-tax compensation expense Allocated Share-based Compensation Expense Related income tax benefit Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Supplemental Employee Retirement Plan Supplemental Employee Retirement Plan [Member] Pro Forma Pro Forma [Member] Retirement Plan Funding Status [Axis] Retirement Plan Funding Status [Axis] Retirement Plan Funding Status [Domain] Retirement Plan Funding Status [Domain] Unfunded Plan Unfunded Plan [Member] Retirement Plan Name [Axis] Retirement Plan Name [Axis] Retirement Plan Name [Domain] Retirement Plan Name [Domain] Hershey Company Puerto Rico Hourly Pension Plan Hershey Company Puerto Rico Hourly Pension Plan [Member] Hershey Company Puerto Rico Hourly Pension Plan [Member] Number of defined benefit, other post-retirement plans, and defined contribution other post-retirement plans (postretirement plan) Number of Defined Benefit Other Post-retirement Plans and Defined Contribution Other Post-retirement Plans Number of Defined Benefit Other Post-retirement Plans and Defined Contribution Other Post-retirement Plans Defined benefit plan, accumulated benefit obligation Defined Benefit Plan, Accumulated Benefit Obligation Defined benefit plan, effect of change in interest method on service and interest cost components Defined benefit plan, effect of change in interest method on service and interest cost components Amount of increase/(decrease) effect of a change in method of interest rate on the aggregate of the service and interest cost components of net periodic benefit costs. Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year Defined benefit plan, ultimate health care cost trend rate Defined Benefit Plan, Ultimate Health Care Cost Trend Rate Employer contributions Defined Benefit Plan, Plan Assets, Contributions by Employer Defined benefit plans, minimum future employer contributions in next fiscal year Defined Benefit Plans, Minimum Future Employer Contributions in Next Fiscal Year Defined Benefit Plans, Minimum Future Employer Contributions in Next Fiscal Year Defined contribution pan, cost recognized Defined Contribution Plan, Cost Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Exercise Price Range [Axis] Exercise Price Range [Axis] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] $33.40 - $81.73 Exercise Price Range One [Member] Exercise Price Range One [Member] $81.74 - $105.91 Exercise Price Range Two [Member] Exercise Price Range Two [Member] $105.92 - $111.76 Exercise Price Range Three [Member] Exercise Price Range Three [Member] $33.40 - $111.76 Exercise Price Range Four [Member] Exercise Price Range Four [Member] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Number Outstanding as of 12/31/17 (shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Weighted- Average Remaining Contractual Life in Years Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term Weighted- Average Exercise Price (USD per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price Number Exercisable as of 12/31/17 (shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Weighted- Average Exercise Price (USD per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Change in benefit obligation Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Projected benefit obligation at beginning of year Defined Benefit Plan, Benefit Obligation Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Plan amendments Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment Actuarial (gain) loss Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Settlement Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement Currency translation and other Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Projected benefit obligation at end of year Change in plan assets Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Fair value of plan assets at beginning of year Defined Benefit Plan, Fair Value of Plan Assets Actual return on plan assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Settlement Defined Benefit Plan, Plan Assets, Payment for Settlement Currency translation and other Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) Benefits paid Defined Benefit Plan, Plan Assets, Benefits Paid Fair value of plan assets at end of year Funded status at end of year Defined Benefit Plan, Funded (Unfunded) Status of Plan Amounts recognized in the Consolidated Balance Sheets: Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract] Other assets Assets for Plan Benefits, Defined Benefit Plan Accrued liabilities Liability, Defined Benefit Plan, Current Other long-term liabilities Liability, Defined Benefit Plan, Noncurrent Total Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position Amounts recognized in Accumulated Other Comprehensive Income (Loss), net of tax: Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax [Abstract] Actuarial net (loss) gain Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Tax Net prior service credit (cost) Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax Net amounts recognized in AOCI Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Foreign Current Foreign Tax Expense (Benefit) Current provision for income taxes Current Income Tax Expense (Benefit) Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State Deferred State and Local Income Tax Expense (Benefit) Foreign Deferred Foreign Income Tax Expense (Benefit) Deferred income tax provision Deferred Income Tax Expense (Benefit) Total provision for income taxes Income Tax Expense (Benefit) Statement of Financial Position [Abstract] Preferred stock, shares issued (shares) Preferred Stock, Shares Issued Treasury stock, shares (shares) Schedule of Stock Compensation Costs Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Schedule of Activity Relating to the Grants of Stock Options Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of Fair Value Estimated on the Grant Date and the Weighted Average Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Outstanding Stock Options Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] Schedule of Activity Relating to Grants of PSUs and RSUs Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Schedule of Information Pertaining to Fair Value of PSUs and RSUs Granted for Potential Future Distribution Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions [Table Text Block] Selling, marketing and administrative Selling, General and Administrative Expenses [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Preferred Stock Preferred Stock [Member] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Treasury Common Stock Treasury Stock [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Noncontrolling Interests in Subsidiaries Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance, stockholders' equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Net income attributable to The Hershey Company Net Income (Loss) Attributable to Parent Net income (loss) attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Dividends: Dividends, Common Stock [Abstract] Common Stock Dividends, Common Stock, Cash Stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Exercise of stock options and incentive-based transactions Stock Issued During Period, Value, Stock Options Exercised Repurchase of common stock Treasury Stock, Value, Acquired, Cost Method Impact of reclassifications to and purchase of redeemable noncontrolling interest Reclassifications of Temporary to Permanent Equity Ending balance, stockholders' equity Equity and Noncontrolling Interest Stockholders' Equity Note Disclosure [Text Block] Amortization of net actuarial loss Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year Amortization of prior service (credit) cost Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year Quarterly Financial Information Disclosure [Abstract] Gross profit Gross Profit Net income per share - basic (USD per share) Earnings Per Share, Basic Net income per share - diluted (USD per share) Earnings Per Share, Diluted Market price of common stock throughout the quarter (USD per share) Share Price Interest expense Interest Expense, Debt Interest Costs Capitalized Adjustment Interest Costs Capitalized Adjustment Interest expense Interest Expense Interest income Investment Income, Interest Interest expense, net Number of brand names Number Of Brand Names Number Of Brand Names Number of countries in which products are marketed, sold and distributed (country) Number Of Countries Where Brands Are Martketed, Sold, And Distributed Number Of Countries Where Brands Are Marketed, Sold, And Distributed Number of reportable segments (segment) Number of Reportable Segments 2018 Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 2019 Defined Benefit Plan, Expected Future Benefit Payment, Year Two 2020 Defined Benefit Plan, Expected Future Benefit Payment, Year Three 2021 Defined Benefit Plan, Expected Future Benefit Payment, Year Four 2022 Defined Benefit Plan, Expected Future Benefit Payment, Year Five 2023-2027 Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter Restructuring and Related Activities [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Liability balance at December 31, 2016 Restructuring Reserve 2017 business realignment charges Restructuring Charges, Business Realignment Reserve Restructuring Charges, Business Realignment Reserve Cash payments Payments for Restructuring Other, net Restructuring Reserve, Accrual Adjustment Liability balance at December 31, 2017 Performance Shares [Member] Performance Shares [Member] Performance Stock Units and Restricted Stock Units [Member] Performance Stock Units and Restricted Stock Units [Member] Performance Stock Units and Restricted Stock Units [Member] Share-based compensation arrangement by share-based payment award, number of shares authorized (shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Employee service share-based compensation, nonvested awards, compensation cost not yet recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Share-based compensation arrangement by share-based payment award, expiration period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Weighted-average fair value of options granted (per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Intrinsic value of options exercised (in millions of dollars) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Employee service share-based compensation, nonvested awards, compensation not yet recognized, stock options Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Share based compensation arrangement, by share based payment award, equity instruments other than options, performance score, percentage Share Based Compensation Arrangement, By Share Based Payment Award, Equity Instruments Other Than Options, Performance Score, Percentage Share Based Compensation Arrangement, By Share Based Payment Award, Equity Instruments Other Than Options, Performance Score, Percentage Intrinsic value of share-based liabilities paid, combined with the fair value of shares vested (in millions of dollars) Share Based Compensation Arrangement By Share Based Payment Award Intrinsic Value Of Share Based Liabilities Paid Combined With Fair Value Of Shares Vested Intrinsic value of share-based liabilities paid, combined with the fair value of shares vested (in millions of dollars). Deferred performance stock units, deferred restricted stock units, and directors' fees and accumulated dividend amounts representing deferred stock units outstanding Deferred Compensation Arrangement with Individual, Shares Issued Common stock, conversion basis (shares) Deferred Compensation Arrangement with Individual, Conversion Basis Deferred Compensation Arrangement with Individual, Conversion Basis Units granted (shares) Estimated values (USD per share) Dividend yields Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable—trade, net Accounts Receivable, Net, Current Inventories Inventory, Net Prepaid expenses and other Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property, plant and equipment, net Other intangibles Intangible Assets, Net (Excluding Goodwill) Other assets Other Assets, Noncurrent Deferred income taxes Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued liabilities Accrued Liabilities, Current Accrued income taxes Accrued Income Taxes, Current Current portion of long-term debt Total current liabilities Liabilities, Current Long-term debt Long-term Debt and Capital Lease Obligations Other long-term liabilities Other Liabilities, Noncurrent Deferred income taxes Total liabilities Liabilities Stockholders’ equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Preferred stock, shares issued: none in 2017 and 2016 Preferred Stock, Value, Issued Common stock Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Treasury—common stock shares, at cost: 149,040,927 in 2017 and 147,642,009 in 2016 Treasury Stock, Value Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total—The Hershey Company stockholders’ equity Stockholders' Equity Attributable to Parent Noncontrolling interest in subsidiary Stockholders' Equity Attributable to Noncontrolling Interest Total stockholders’ equity Total liabilities and stockholders’ equity Liabilities and Equity Ripple Brand Collective, LLC [Member] Ripple Brand Collective, LLC [Member] Ripple Brand Collective, LLC [Member] Business Acquisition and Divestitures [Line Items] Schedule of Purchase Consideration Allocation to Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Earnings Per Share [Abstract] Schedule of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Domestic Plans Domestic Plan [Member] Defined Benefit Plan, Asset Categories [Axis] Defined Benefit Plan, Asset Categories [Axis] Plan Asset Categories [Domain] Plan Asset Categories [Domain] Cash Cash and Cash Equivalents [Member] Equity securities Equity Securities [Member] Fixed income securities Debt Securities [Member] Alternative investments, including real estate, listed infrastructure and other Other Investments [Member] Defined Benefit Plan, Plan Assets, Target Allocation, Percentage Defined Benefit Plan, Plan Assets, Target Allocation, Percentage Severance Employee Severance [Member] Accelerated depreciation and amortization Accelerated Depreciation and Amortization [Member] Accelerated Depreciation and Amortization [Member] Other program costs Other Restructuring [Member] Pension settlement charge Pension Settlement Charge [Member] Pension Settlement Charge [Member] Operation optimization program China Structure Optimization [Member] China Structure Optimization [Member] 2015 productivity initiative Productivity Initiative 2015 [Member] Productivity Initiative 2015 [Member] Other international restructuring programs Other International Restructuring Programs [Member] Other International Restructuring Programs [Member] Cost of Sales Cost of Sales [Member] Business realignment charges Restructuring Charges [Member] Business realignment costs Computer Software Software and Software Development Costs [Member] Capitalized software, net Capitalized Computer Software, Net Capitalized computer software, accumulated amortization Capitalized Computer Software, Accumulated Amortization Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Risk-free interest rates Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected term in years Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Lotte Shanghai Food Company Lotte Shanghai Food Company [Member] Lotte Shanghai Food Company [Member] Common and preferred shares authorized (shares) Common and Preferred Stock, Shares Authorized Common and Preferred Stock, Shares Authorized Common stock, shares authorized (shares) Common Stock, Shares Authorized Preferred stock, shares authorized (shares) Preferred Stock, Shares Authorized Common stock, par (USD per share) Common Stock, Par or Stated Value Per Share Preferred stock, par value (USD per share) Preferred Stock, Par or Stated Value Per Share Common stock voting rights, board election percentage Common Stock Voting Rights, Board Election Percentage Common Stock Voting Rights, Board Election Percentage Common stock, voting rights (vote) Common Stock, Number of Votes Common Stock, Number of Votes Dividends, common sock, cash, additional percentage over Class B common stock dividends Dividends, Common Stock, Cash, Additional Percentage Over Class B Common Stock Dividends Dividends, Common Stock, Cash, Additional Percentage Over Class B Common Stock Dividends Conversion of Stock, Shares Converted Conversion of Stock, Shares Converted Common stock, voting percentage Common Stock, Voting Percentage Common Stock, Voting Percentage Treasury Stock Acquired, Average Cost Per Share Treasury Stock Acquired, Average Cost Per Share Stock Repurchased During Period, Value Stock Repurchased During Period, Value Noncontrolling interest, ownership percentage by parent Noncontrolling Interest, Ownership Percentage by Parent Geographic Concentration Risk Geographic Concentration Risk [Member] Sales Revenue, Goods, Net Sales Revenue, Goods, Net [Member] Derivative, Gain (Loss) on Derivative, Net Derivative Instruments Derivatives and Fair Value [Text Block] Schedule of Other (Income) Expense, Net Other Income and Other Expense Disclosure [Text Block] - RIPPLE BRAND COLLECTIVE, LLC [Abstract] - RIPPLE BRAND COLLECTIVE, LLC [Abstract] Other Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Basic earnings per share: Earnings Per Share, Basic, Two Class Method [Abstract] Allocation of distributed earnings (cash dividends paid) Dividends Allocation of undistributed earnings Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Total earnings—basic Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Total weighted-average shares—basic (shares) Weighted Average Number of Shares Outstanding, Basic Earnings Per Share—basic (USD per share) Diluted earnings per share: Earnings Per Share, Diluted, Two Class Method [Abstract] Allocation of total earnings used in basic computation Reallocation of total earnings as a result of conversion of Class B common stock to Common stock Distributed Earnings Reallocation of undistributed earnings Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Total earnings—diluted Participating Securities, Distributed and Undistributed Earnings (Loss), Diluted Conversion of Class B common stock to Common shares outstanding Incremental Common Shares Attributable to Dilutive Effect of Conversion of Common Stock Incremental Common Shares Attributable to Dilutive Effect of Conversion of Common Stock Incremental common shares attributable to dilutive effect of share-based payment arrangements Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Total weighted-average shares—diluted (shares) Weighted Average Number of Shares Outstanding, Diluted Earnings Per Share—diluted (USD per share) Ripple Brand Collective, LLC Assets Acquired and Liabilities Assumed Allocation [Abstract] Ripple Brand Collective, LLC Assets Acquired and Liabilities Assumed Allocation [Abstract] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Other current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Customer-related Customer-Related Intangible Assets [Member] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Finite-lived intangible assets, gross Finite-Lived Intangible Assets, Gross Finite-lived intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Indefinite-lived intangible assets, excluding goodwill Indefinite-Lived Intangible Assets (Excluding Goodwill) Total other intangible assets Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Supplemental Balance Sheet Information Schedule of Supplemental Balance Sheet Information [Table Text Block] Schedule of Supplemental Balance Sheet Information [Table Text Block] Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Income before income taxes Schedule of Long-term Debt Instruments Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of Net Interest Expense Interest Income and Interest Expense Disclosure [Table Text Block] Supplemental Balance Sheet Information Supplemental Balance Sheet Disclosures [Text Block] Schedule of Net Sales and Earnings by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Unallocated Mark-to-Market (Gains) Losses on Commodity Derivatives Allocation Of Net Derivative Gains Losses From Economic Hedges To Operating Results Of Reporting Segments Table [Table Text Block] Allocation Of Net Derivative Gains Losses From Economic Hedges To Operating Results Of Reporting Segments Table [Table Text Block] Schedule of Depreciation and Amortization Expense Included within Segment Income Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table Text Block] Schedule of Segment Information by Geography Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Research and development costs Research and Development Expense Advertising expense Advertising Expense Prepaid advertising expense Prepaid Advertising Income Statement [Abstract] Cost of sales Cost of Goods Sold Selling, marketing and administrative expense Selling, General and Administrative Expense Long-lived asset impairment charges Asset Impairment Charges Business realignment costs Restructuring Charges, Business Realignment Restructuring Charges, Business Realignment Operating profit Provision for income taxes Net income including noncontrolling interest Net income (loss) attributable to noncontrolling interests Net income attributable to The Hershey Company Net income per share—basic: Earnings Per Share, Basic [Abstract] Net income per share—diluted: Earnings Per Share, Diluted [Abstract] Dividends paid per share: Business Acquisitions and Divestitures Mergers, Acquisitions and Dispositions Disclosures [Text Block] Long-term Debt, Fiscal Year Maturity [Abstract] Long-term Debt, Fiscal Year Maturity [Abstract] 2018 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2019 Long-term Debt, Maturities, Repayments of Principal in Year Two 2020 Long-term Debt, Maturities, Repayments of Principal in Year Three 2021 Long-term Debt, Maturities, Repayments of Principal in Year Four 2022 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Summary of Investments, Other than Investments in Related Parties [Table] Summary of Investments, Other than Investments in Related Parties [Table] Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] Write-down of equity investments in partnerships qualifying for tax credits Gain on settlement of SGM liability (see Note 2) Gain on sale of non-core trademark Gain (Loss) on Disposition of Intangible Assets Other (income) expense, net Other Nonoperating, Gain (Loss) Other Nonoperating, Gain (Loss) Total Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Gross derivative assets, included within derivative liabilities Derivative Asset, Cash Transfers Receivable (Payable), Change In Quoted Market Prices On The Last Day Of Trading Derivative Asset, Cash Transfers Receivable (Payable), Change In Quoted Market Prices On The Last Day Of Trading Derivative liability, gross liabilities Derivative Liability, Cash Transfers Receivable (Payable), Change In Quoted Market Prices On The Last Day Of Trading Derivative Liability, Cash Transfers Receivable (Payable), Change In Quoted Market Prices On The Last Day Of Trading Schedule of Quarterly Financial Information Quarterly Financial Information [Table Text Block] Shanghai Golden Monkey [Abstract] Shanghai Golden Monkey [Abstract] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] Business Acquisition, Percentage of Voting Interests Acquired Business Acquisition, Percentage of Voting Interests Acquired Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net Gains (losses) recognized in other comprehensive income (“OCI”) (effective portion) Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Gains (losses) reclassified from accumulated OCI into income (effective portion) Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Corporate (1) Corporate Segment [Member] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive securities excluded from computation of earnings per share (shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Stock Compensation Plans Disclosure of Compensation Related Costs, Share-based Payments [Text 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AOCI, before Tax Reclassification to earnings, tax (expense) benefit Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax Reclassification to earnings, after-tax amount Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Cash flow hedges: Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax [Abstract] Gains (losses) on cash flow hedging derivatives, pre-tax amount Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Gains (losses) on cash flow hedging derivatives, tax (expense) benefit Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Gains (losses) on cash flow hedging derivatives, after-tax amount Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Reclassification to earnings, pre-tax amount Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax Reclassification to earnings, tax (expense) benefit Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax Reclassification to earnings, after-tax amount Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax Total other comprehensive income (loss), pre-tax amount Other Comprehensive Income (Loss), before Tax Total other comprehensive income (loss), tax (expense) benefit Other Comprehensive Income (Loss), Tax Total other comprehensive income (loss), after-tax amount Total comprehensive income including noncontrolling interest Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive loss attributable to noncontrolling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income attributable to The Hershey Company Comprehensive Income (Loss), Net of Tax, Attributable to Parent Subsequent Events [Text Block] Subsequent Events [Text Block] Schedule of the Classification of Derivative Assets and Liabilities within the Consolidated Balance Sheets Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of the Effect of Derivative Instruments on the Consolidated Statements of Income Derivative Instruments, Gain (Loss) [Table Text Block] Concentration Risk [Table] Concentration Risk [Table] Workforce Subject to Collective Bargaining Arrangements Workforce Subject to Collective Bargaining Arrangements [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Entity number of employees Entity Number of Employees Entity number of part-time employees Entity Number of Part-Time Employees Entity Number of Part-Time Employees Percentage of employees Fair Value, Net Asset (Liability) Fair Value, Net Asset 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Statutory Income Tax Rate, Percent State income taxes, net of Federal income tax benefits Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Qualified production income deduction Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent Business realignment and impairment charges and gain on sale of trademark licensing rights Effective Income Tax Rate Reconciliation, Nondeductible Expense, Restructuring Charges, Percent Foreign rate differences Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Historic and solar tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Percent U.S. tax reform Effective Income Tax Rate Reconciliation, Tax Settlement, Domestic, Percent Other, net Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Schedule of Defined Benefit Obligations, Plan Assets, and Funded Status Schedule of Defined Benefit Plans Disclosures [Table Text Block] Schedule of Accumulated Benefit Obligations in Excess of Plan Assets Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block] Schedule of Components of Net Periodic Benefit Cost Schedule of Net Benefit Costs [Table Text Block] Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block] Schedule of Weighted-Average Assumptions Used in Computing the Benefit Obligation Schedule of Assumptions Used [Table Text Block] Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block] Schedule of Allocation of Plan Assets Schedule of Allocation of Plan Assets [Table Text Block] Schedule of Expected Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Balance at beginning of year Unrecognized Tax Benefits Additions for tax positions taken during prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Reductions for tax positions taken during prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Additions for tax positions taken during the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Settlements Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Expiration of statutes of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of 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Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding shares at beginning of year (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Exercised (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Outstanding as of December 31, 2017 (shares) Options exercisable as of December 31, 2017 (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (USD per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercises (USD per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Forfeited (USD per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Outstanding (USD per share) Options exercisable (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Options outstanding, weighted-average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Options exercisable, weighted aver remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate intrinsic value of options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate intrinsic value of options exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Other current assets Non-current deferred tax liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Capital Leases, Future Minimum Payments Due, Next Twelve Months Capital Leases, Future Minimum Payments Due, Next Twelve Months Capital Leases, Future Minimum Payments Due in Two Years Capital Leases, Future Minimum Payments Due in Two Years Capital Leases, Future Minimum Payments Due in Three Years Capital Leases, Future Minimum Payments Due in Three Years Capital Leases, Future Minimum Payments Due in Four Years Capital Leases, Future Minimum Payments Due in Four Years Capital Leases, Future Minimum Payments Due in Five Years 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pre-tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract] Actuarial net (gain) loss Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax Prior service (credit) cost Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Reclassification Adjustment, before Tax Total recognized in other comprehensive (income) loss, pre-tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Net amounts recognized in periodic benefit cost and AOCI Defined Benefit Plan, Amount Recognized in Net Periodic Benefit Cost (Credit) and Other Comprehensive (Income) Loss, before Tax Description of Business and Basis of Presentation Business Description and Basis of Presentation [Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy 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