Statement of Consolidated Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 80	$ 215
Other comprehensive income (loss), net of tax
Change in unrecognized net actuarial loss and prior service cost related to pension and other postretirement benefits	42	37
Foreign currency translation adjustments	(44)	(65)
Net change in unrealized gains on debt securities	0	1
Net change in unrecognized gains (losses) on cash flow hedges	4	(13)
Total Other comprehensive income (loss), net of tax	2	(40)
Comprehensive income	$ 82	$ 175