Statement of Consolidated Comprehensive Income (unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 95	$ 161	$ 161	$ 424
Other comprehensive (loss) income, net of tax (J):
Change in unrecognized net actuarial loss and prior service cost/benefit related to pension and other postretirement benefits	26	37	89	209
Foreign currency translation adjustments	(87)	(16)	(91)	(95)
Net change in unrealized gains on available-for-sale securities	1	1	4	(1)
Net change in unrecognized gains/losses on cash flow hedges	1	(10)	(2)	(13)
Total Other comprehensive (loss) income, net of tax	(59)	12	0	100
Comprehensive income	$ 36	$ 173	$ 161	$ 524