Reclassifications from Accumulated Other Comprehensive Income (AOCI) - Schedule of Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	$ (47)	$ (478)
Other comprehensive income (loss) before reclassifications	163	290
Amounts reclassified from AOCI (a)	215	141
Total other comprehensive income (loss), net of tax	378	431	$ 548
Balance, end of period	331	(47)	(478)
Pension and Other Benefit Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(458)	(843)
Other comprehensive income (loss) before reclassifications	297	271
Amounts reclassified from AOCI (a)	136	114
Total other comprehensive income (loss), net of tax	433	385
Balance, end of period	(25)	(458)	(843)
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	449	381
Other comprehensive income (loss) before reclassifications	(78)	68
Amounts reclassified from AOCI (a)	0	0
Total other comprehensive income (loss), net of tax	(78)	68
Balance, end of period	371	449	381
Unrealized Gain (Loss) on Derivatives
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, beginning of period	(38)	(16)
Other comprehensive income (loss) before reclassifications	(56)	(49)
Amounts reclassified from AOCI (a)	79	27
Total other comprehensive income (loss), net of tax	23	(22)
Balance, end of period	$ (15)	$ (38)	$ (16)