Fair Value Measurements and Financial Instruments - Schedule of Gain (Loss) Included in OCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Cash flow hedges [Abstract]
Gain (loss) recognized in OCI	$ (1)	$ 6	$ 2	$ 3
Foreign Currency Contracts
Cash flow hedges [Abstract]
Gain (loss) recognized in OCI	(7)	7	6	2
Net investment hedges [Abstract]
Gain (loss) on instruments	(21)	23	(8)	22
Gain (loss) on hedged items	21	(23)	8	(22)
Forward-starting interest rate swaps
Cash flow hedges [Abstract]
Gain (loss) recognized in OCI	4	0	(4)	0
Commodity Contracts
Cash flow hedges [Abstract]
Gain (loss) recognized in OCI	2	(1)	0	1
Foreign Currency Debt
Net investment hedges [Abstract]
Gain (loss) on instruments	(171)	100	(174)	105
Gain (loss) on hedged items	$ 171	$ (100)	$ 174	$ (105)