Fair Value Measurements and Financial Instruments - Schedule of Gain (Loss) Included in OCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Cash flow hedges [Abstract]
Gain (loss) recognized in OCI	$ (22)	$ (1)	$ 3	$ (3)
Foreign Currency Contracts
Cash flow hedges [Abstract]
Gain (loss) recognized in OCI	(12)	(2)	13	(5)
Net investment hedges [Abstract]
Gain (loss) on instruments	(12)	(7)	13	(1)
Gain (loss) on hedged items	12	7	(13)	1
Forward-starting interest rate swaps
Cash flow hedges [Abstract]
Gain (loss) recognized in OCI	(8)	0	(8)	0
Commodity Contracts
Cash flow hedges [Abstract]
Gain (loss) recognized in OCI	(2)	1	(2)	2
Foreign Currency Debt
Net investment hedges [Abstract]
Gain (loss) on instruments	(68)	(24)	(3)	5
Gain (loss) on hedged items	$ 68	$ 24	$ 3	$ (5)