Segment Information - Operating Income to Income Before Income Taxes Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	$ 470	$ 503	$ 1,210	$ 1,236
Net interest expense	(39)	(13)	(96)	(51)
Other (income) expense, net	16	9	32	(8)
Income before income taxes	415	481	1,082	1,193
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	898	895	2,522	2,574
Corporate and Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income (loss)	$ (428)	$ (392)	$ (1,312)	$ (1,338)