CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
NET (LOSS) INCOME	$ (10,298)	$ (1,548)	$ 2,033
Items related to employee benefit plans:
Change in net actuarial loss, net of $20, $(205) and $(134) tax	(59)	631	424
Reclassification of net actuarial loss to (loss) gain on the sale of businesses, net of $—, $(142) and $— tax	(22)	422	0
Settlement charges recognized in net (loss) income, net of $—, $— and $(93) tax	0	0	290
Change in net prior service cost, net of $4, $(9) and $(5) tax	(11)	30	14
Reclassification of prior service credit to (loss) gain on the sale of businesses, net of $—, $6 and $— tax	0	(19)	0
Reclassification of realized loss on interest rate swaps to net (loss) income, net of $—, $(5) and $(20) tax	0	17	63
Unrealized holding loss on interest rate swaps, net of $—, $— and $— tax	0	0	(1)
Reclassification of realized loss on foreign currency translation to (loss) gain on the sale of businesses, net of $—, $— and $— tax	382	112	0
Foreign currency translation adjustment, net of $(3), $58 and $30 tax	(1)	(134)	(135)
Other comprehensive income	289	1,059	655
COMPREHENSIVE (LOSS) INCOME	$ (10,009)	$ (489)	$ 2,688