Fair Value Measurements - Summary of Financial Instruments Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange contracts	$ 29	$ 11
Interest rate contracts		10
Marketable equity securities	3	3
Total assets	32	24
Foreign exchange contracts	7	2
Interest rate contracts	226	52
Contingent payments related to acquisitions	39	39
Total liabilities	272	93
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange contracts	0	0
Interest rate contracts		0
Marketable equity securities	3	3
Total assets	3	3
Foreign exchange contracts	0	0
Interest rate contracts	0	0
Contingent payments related to acquisitions	0	0
Total liabilities	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange contracts	29	11
Interest rate contracts		10
Marketable equity securities	0	0
Total assets	29	21
Foreign exchange contracts	7	2
Interest rate contracts	226	52
Contingent payments related to acquisitions	0	0
Total liabilities	233	54
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange contracts	0	0
Interest rate contracts		0
Marketable equity securities	0	0
Total assets	0	0
Foreign exchange contracts	0	0
Interest rate contracts	0	0
Contingent payments related to acquisitions	39	39
Total liabilities	$ 39	$ 39