CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 475	$ 314
Items related to employee benefit plans:
Change in net actuarial loss, net of $(12) and $(12) tax	38	38
Change in net prior service cost, net of $(1) and $— tax	1	1
Reclassification of realized loss on interest rate swaps to net income, net of $(5) and $— tax	15	5
Unrealized holding loss on interest rate swaps, net of $— and $26 tax	0	(80)
Foreign currency translation adjustment, net of $7 and $23 tax	(86)	(239)
Other comprehensive loss	(32)	(275)
COMPREHENSIVE INCOME	$ 443	$ 39