Statement of Consolidated Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 27	$ 36	$ 181	$ 155
Other comprehensive income (loss), net of tax:
Change in unrecognized net actuarial loss and prior service cost related to pension and other postretirement benefits	13	8	90	54
Foreign currency translation adjustments	(36)	48	(62)	(25)
Net change in unrecognized (losses) gains on cash flow hedges	(4)	5	4	1
Total other comprehensive (loss) income, net of tax	(27)	61	32	30
Comprehensive income	$ 0	$ 97	$ 213	$ 185