FINANCIAL INSTRUMENTS, DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Details)	1 Months Ended	3 Months Ended				6 Months Ended		12 Months Ended
	May 31, 2019 EUR (€)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	May 31, 2017 EUR (€)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value, Gross Asset								$ 21,000,000	$ 25,000,000
Derivative Liability, Fair Value, Gross Liability								54,000,000	6,000,000
Derivative, Notional Amount									0	$ 0
Terminated fair value hedges									150,000,000
Gain (loss) on hedged item in fair value hedge									4,000,000	3,000,000
Deferred, net after-tax gains on derivative instruments								6,000,000
Gross amount subject to offset in master netting arrangements not offset in the consolidated balance sheet, asset								11,000,000	3,000,000
Gross amount subject to offset in master netting arrangements not offset in the consolidated balance sheet, liability								11,000,000	3,000,000
Derivative assets								10,000,000	22,000,000
Derivative liabilities								43,000,000	3,000,000
Currency translation adjustments, net of tax expense (benefit) of ($5) in 2019, ($52) in 2018 and $89 in 2017		$ 2,000,000	$ (97,000,000)	$ (368,000,000)	$ 63,000,000	$ (95,000,000)	$ (305,000,000)	(95,000,000)	(323,000,000)	599,000,000
1.30% Senior Notes due May 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Senior notes | €											€ 600,000,000
0.40% Senior Notes due May 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Senior notes | €	€ 750,000,000
1.3% Senior Notes due May 2029
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Senior notes | €	750,000,000
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value, Gross Asset								20,000,000	23,000,000
Derivative Liability, Fair Value, Gross Liability								52,000,000	4,000,000
Derivative, Notional Amount								0
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount								619,000,000	487,000,000
Net investment hedge
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Accumulated pre-tax unrealized translation losses in AOCI related to euro-denominated senior notes								21,000,000
Net investment hedge | Designated as Hedging Instrument | Forward Contracts [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Currency translation adjustments, net of tax expense (benefit) of ($5) in 2019, ($52) in 2018 and $89 in 2017 | €	€ 1,200,000,000
Foreign exchange contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount								$ 617,000,000	706,000,000
Maximum length of time hedge in cash flow hedge								12 months
Interest rate contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount								$ 550,000,000
Gain (loss) on hedged item in fair value hedge								0	(4,000,000)	$ (3,000,000)
Interest rate contract | Fair value hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount								$ 0	$ 0