Statement of Consolidated Comprehensive Income (Loss) (unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ (96)	$ (121)	$ 119	$ 66
Other comprehensive income (loss), net of tax (J):
Change in unrecognized net actuarial loss and prior service cost/benefit related to pension and other postretirement benefits	9	23	46	63
Foreign currency translation adjustments	(8)	(30)	(73)	(4)
Net change in unrealized gains (losses) on available-for-sale securities	(1)	0	0	3
Net change in unrecognized gains (losses) on cash flow hedges	9	(10)	(4)	(3)
Total Other comprehensive income (loss), net of tax	9	(17)	(31)	59
Comprehensive income (loss)	$ (87)	$ (138)	$ 88	$ 125