SUPPLEMENTAL FINANCIAL STATEMENT INFORMATION Current Investments Footnote (Details) $ in Millions		3 Months Ended
Apr. 21, 2022 USD ($)	Dec. 31, 2021
Debt and Equity Securities, FV-NI [Line Items]
Percentage of ownership retained		19.90%
Sylvamo Corporation Investment \| Subsequent Event [Member]
Debt and Equity Securities, FV-NI [Line Items]
Aggregate Untis Exchanged - Sylvamo Corporation Investment	4,132,000
Percentage of ownership retained	10.50%
Notes Reduction	$ 144
Sale of Stock, Ownership Shares after Transaction	4,614,358

The value of notes retired (or transferred to another entity) in noncash investing or financing transactions.

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