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Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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DIVESTITURES Narrative (Details) € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 EUR (€)	Jun. 30, 2021 USD ($)	Jun. 30, 2021 EUR (€)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net (gains) losses on sales and impairments of businesses	$ 0.0						$ (2.0)
Change in cumulative foreign currency translation adjustment	48.0						143.0
Sylvamo Corporation Investment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Related Party Transaction, Other Revenues from Transactions with Related Party	$ 198.0
Discontinued Operations, Held-for-sale or Disposed of by Sale \| Kwidzyn Mill
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses			$ 794.0	€ 669.0
Net (gains) losses on sales and impairments of businesses			404.0
Net (gains) losses on sales and impairments of businesses, net of tax			350.0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax			44.0
Divestiture costs		$ 9.0
Divestiture costs, net of taxes		6.0
Net (gains) losses on sales and impairments of businesses			360.0
Gain (Loss) on Sale of Assets and Asset Impairment Charges, net of tax			394.0
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff \| Printing Papers [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from issuance of debt			1,500.0
Cash Distribution to Sylvamo Corporation		$ 130.0
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff \| Printing Papers [Member] \| Term Loan "B" Facility
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from issuance of debt			450.0
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff \| Printing Papers [Member] \| Term Loan "F" Facility
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from issuance of debt			520.0
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff \| Printing Papers [Member] \| Revolving Credit Facility [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Lines of Credit			100.0
Revolving credit facilities available			450.0
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff \| Printing Papers [Member] \| Unsecured Debt
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from issuance of debt			$ 450.0
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff \| Printing Papers [Member] \| Minimum [Member] \| Unsecured Debt
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			7.00%
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] \| Olmuksan
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses					$ 81.0	€ 66.0
Net (gains) losses on sales and impairments of businesses					(6.0)			$ 123.0
Net (gains) losses on sales and impairments of businesses, net of tax					$ 0.0			123.0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax							2.0
Sale of stock, percentage of ownership before transaction					90.38%	90.38%
Assets, Fair Value Disclosure								$ 79.0
Change in cumulative foreign currency translation adjustment							$ 2.0