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Packaging Corp. of America (N.D. Ill.) Artuso Pastry Foods Corp v. Packaging Corp. of America (N.D. Ill.) [Member] Artuso Pastry Foods Corp v. Packaging Corp. of America (N.D. Ill.) 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Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Gain on disposition of business Gain (Loss) on Disposition of Business Document Fiscal Year Focus Document Fiscal Year Focus Receivables Securitization Program Receivables Securitization Program [Member] Receivables Securitization Program Right of Use Assets Operating lease assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Reduction of debt Repayments of Long-Term Debt Entity Interactive Data Current Entity Interactive Data Current Software Computer Software, Intangible Asset [Member] Net special items Segment Reporting Information Special Items Segment Reporting Information Special Items Business combination, acquisition-related cost, expense Business Combination, Acquisition-Related Cost, Expense Resource and asset realignment - PS EMEA Resource And Asset Realignment - Packaging Solutions EMEA [Member] Resource And Asset Realignment - Packaging Solutions EMEA Compensation cost related to unvested restricted performance shares, executive continuity awards and restricted stock attributable to future performance, net of estimated forfeitures, weighted-average period (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Statement of Stockholders' Equity [Table] Statement of Stockholders' Equity [Table] Statement Responsible party percentage-Sylvamo Responsible Party Percentage-Sylvamo Responsible Party Percentage-Sylvamo Equity [Abstract] Equity [Abstract] BUSINESS SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Goodwill [Table] Goodwill [Table] Derivatives not designated as hedging instruments Not Designated as Hedging Instrument [Member] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Resource and asset realignment - PS NA Resource 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Central Index Key Settlement Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Accounts and notes receivable Increase (Decrease) in Accounts and Notes Receivable PEO Name PEO Name Asset retirement obligation Asset Retirement Obligation Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Schedule of Stockholders' Equity Schedule of Stockholders Equity [Table Text Block] Revolving Credit Facility Revolving Credit Facility [Member] Defined Benefit Plan [Table] Defined Benefit Plan [Table] Arrangement Duration Trading Arrangement Duration Business combination, acquiree's earnings (loss) since acquisition date, actual Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual Cass Lake, Minnesota Cass Lake Minnesota [Member] Cass Lake, Minnesota [Member] Contract liability, current Contract with Customer, Liability, Current Business Segments [Axis] Segments [Axis] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Additional Depreciation Expense On Fixed Assets Additional Depreciation Expense On Fixed Assets [Member] Additional Depreciation Expense On Fixed Assets Other Other Inventory, Net of Reserves Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Other Payment for (Proceeds from) Other Investing Activity Subsequent Event Type [Axis] Subsequent Event Type [Axis] STOCK-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Intangibles Finite and indefinite lived intangible assets acquired Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill Cash and temporary investments Business Combination, Recognized Asset Acquired, Cash and Cash Equivalent Net loss on sales and impairments of business, pre-tax Net (gains) losses on sales and impairment of business Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Assets Assets [Abstract] Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Statement of Financial Position Location, Balance [Axis] Statement of Financial Position Location, Balance [Axis] Accrued Payroll and Benefits Accrued Payroll and Benefits [Member] Accrued Payroll and Benefits Debt Instrument [Axis] Debt Instrument [Axis] Cash and temporary investments Cash included in assets held for sale Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents RETIREMENT PLANS Retirement Benefits [Text Block] Business Combination [Line Items] Business Combination [Line Items] Gain (Loss) Reclassified from AOCL Into Income Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Credit Facility [Domain] Credit Facility [Domain] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Business Combination, Pro Forma Information, Nonrecurring Adjustment [Axis] Business Combination, Pro Forma Information, Nonrecurring Adjustment [Axis] Entity Address, Address Line One Entity Address, Address Line One Repurchase of stock Treasury Stock, Value, Acquired, Cost Method Deferred charges and other assets Business Combination, Recognized Asset Acquired, Asset, Noncurrent Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Debt instrument, interest rate, stated percentage Debt Instrument, Interest Rate, Stated Percentage Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Long-Term Lease Obligations Operating lease, liability, noncurrent Operating Lease, Liability, Noncurrent Georgia-Pacific Consumer Products LP, Fort James Corporation and Georgia Pacific LLC Cost Recovery Action Georgia-Pacific Consumer Products LP, Fort James Corporation and Georgia Pacific LLC Cost Recovery Action [Member] Georgia-Pacific Consumer Products LP, Fort James Corporation and Georgia Pacific LLC Cost Recovery Action [Member] Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Plants, Properties and Equipment Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent Business Combination, Pro Forma Information, Nonrecurring Adjustment [Domain] Business Combination, Pro Forma Information, Nonrecurring Adjustment [Domain] DERIVATIVES AND HEDGING ACTIVITIES Derivative Instruments and Hedging Activities Disclosure [Text Block] Net sales from external customers Operating Segments Excluding Intersegment Elimination [Member] Operating Segments Excluding Intersegment Elimination Amortization of prior service cost Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Assets Derivative Asset, Subject to Master Netting Arrangement, before Offset 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] Fair Value as of Grant Date Award Grant Date Fair Value Entity Registrant Name Entity Registrant Name Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Stock 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