Reportable Segments (Reconciliation of Reportable Segment and All Other Net Sales to Consolidated Net Sales) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Reportable Segments [Abstract]
Net sales of reportable segments and All Other	$ 2,588	$ 2,986	$ 5,117	$ 5,836
Impact of foreign currency movements	(27)	(46)	(60)	(84)
Cumulative adjustment related to customer contract			(105)
Net sales	$ 2,561	$ 2,940	$ 4,952	$ 5,752