CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
NET (LOSS) INCOME	$ (1,548)	$ 2,033	$ (1,232)
Items related to employee benefit plans:
Change in net actuarial loss, net of $(205), $(134) and $26 tax	631	424	(92)
Reclassification of net actuarial loss to gain on the sale of business, net of $(142), $— and $— tax	422	0	0
Settlement charges recognized in net income (loss), net of $—, $(93) and $— tax	0	290	0
Change in net prior service cost, net of $(9), $(5) and $(12) tax	30	14	33
Reclassification of prior service credit to gain on the sale of business, net of $6, $— and $— tax	(19)	0	0
Curtailment loss, net of $—, $— and $(1) tax	0	0	3
Reclassification of realized loss on interest rate swaps to net (loss) income, net of $(5), $(20) and $(16) tax	17	63	46
Unrealized holding loss on interest rate swaps, net of $—, $— and $29 tax	0	(1)	(86)
Reclassification of realized loss on foreign currency translation to gain on the sale of business, net of $—, $— and $— tax	112	0	0
Foreign currency translation adjustment, net of $58, $30 and $(43) tax	(134)	(135)	(37)
Other comprehensive income (loss)	1,059	655	(133)
COMPREHENSIVE (LOSS) INCOME	$ (489)	$ 2,688	$ (1,365)