Fair Value Measurements and Financial Instruments - Schedule of Gain (Loss) Included in OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash flow hedges [Abstract]
Gain (loss) recognized in OCI	$ (3)	$ (9)
Foreign currency contracts
Cash flow hedges [Abstract]
Gain (loss) recognized in OCI	(11)	(9)
Net investment hedges [Abstract]
Gain (loss) on instruments	(52)	4
Gain (loss) on hedged items	52	(4)
Forward-starting interest rate swaps
Cash flow hedges [Abstract]
Gain (loss) recognized in OCI	5	0
Commodity contracts
Cash flow hedges [Abstract]
Gain (loss) recognized in OCI	3	0
Foreign Currency Debt
Net investment hedges [Abstract]
Gain (loss) on instruments	(356)	12
Gain (loss) on hedged items	$ 356	$ (12)