FAIR VALUE MEASUREMENTS - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign exchange contracts	$ 11	$ 25
Interest rate hedges, assets at fair value	10
Marketable equity securities	3	3
Total assets	24	28
Foreign exchange contracts	2	3
Interest rate contracts, liabilities at fair value	52	3
Contingent payments related to acquisitions	39	32
Total liabilities	93	38
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 hedges, assets at fair value	0
Marketable equity securities	3	3
Total assets	3	3
Foreign exchange contracts	0	0
Interest rate contracts, liabilities at fair value	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	11	25
Interest rate hedges, assets at fair value	10
Marketable equity securities	0	0
Total assets	21	25
Foreign exchange contracts	2	3
Interest rate contracts, liabilities at fair value	52	3
Contingent payments related to acquisitions	0	0
Total liabilities	54	6
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 hedges, assets at fair value	0
Marketable equity securities	0	0
Total assets	0	0
Foreign exchange contracts	0	0
Interest rate contracts, liabilities at fair value	0	0
Contingent payments related to acquisitions	39	32
Total liabilities	$ 39	$ 32