(Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ (1,565)	$ (1,925)	$ (1,666)
Amounts reclassified from accumulated other comprehensive loss	(603)	(98)	(2,073)
Defined Benefit Pension and Postretirement Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(1,276)	(1,195)	(962)	$ (1,880)
Other comprehensive income (loss) before reclassifications	(167)	(319)	713
Reclassification related to Sylvamo Corporation spin-off	0	0	80
Amounts reclassified from accumulated other comprehensive loss	86	86	125
Change in Cumulative Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(281)	(722)	(694)	(2,457)
Other comprehensive income (loss) before reclassifications	(76)	(38)	(115)
Reclassification related to Sylvamo Corporation spin-off	0	0	1,692
Amounts reclassified from accumulated other comprehensive loss	517	10	184
Other Comprehensive Income (Loss) Attributable to Noncontrolling Interest	0	0	2
Net Gains and Losses on Cash Flow Hedging Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(8)	(8)	(10)	$ (5)
Other comprehensive income (loss) before reclassifications	0	0	3
Reclassification related to Sylvamo Corporation spin-off	0	0	1
Amounts reclassified from accumulated other comprehensive loss	$ 0	$ 2	$ (9)