GOODWILL AND INTANGIBLE ASSETS (Schedules) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets, Cost	$ 1,968		$ 1,968		$ 1,820
Intangible assets, Accumulated Amortization	(776)		(776)		(699)
Total intangible assets, Net	1,192		1,192		1,121
Amortization expense	27	$ 23	77	$ 72
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2020	27		27
2021	101		101
2022	98		98
2023	96		96
2024	93		93
2025	91		91
Thereafter	450		450
Total	956		956
Intangible Assets Not Subject to Amortization - Tradenames
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets, Cost	235		235		235
Total intangible assets, Net	235		235		235
Intangible Assets Not Subject to Amortization - Other
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets, Cost	1		1		1
Total intangible assets, Net	1		$ 1		1
Customer-related intangibles
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			17 years
Intangible assets, Cost	1,479		$ 1,479		1,367
Intangible assets, Accumulated Amortization	(617)		(617)		(556)
Total intangible assets, Net	862		$ 862		811
Non-compete agreements
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			9 years
Intangible assets, Cost	3		$ 3		3
Intangible assets, Accumulated Amortization	(2)		(2)		(2)
Total intangible assets, Net	1		$ 1		1
Technology
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			15 years
Intangible assets, Cost	140		$ 140		104
Intangible assets, Accumulated Amortization	(63)		(63)		(56)
Total intangible assets, Net	77		$ 77		48
Other
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			9 years
Intangible assets, Cost	110		$ 110		110
Intangible assets, Accumulated Amortization	(94)		(94)		(85)
Total intangible assets, Net	16		$ 16		25
Total Amortizing Intangible Assets
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			17 years
Intangible assets, Cost	1,732		$ 1,732		1,584
Intangible assets, Accumulated Amortization	(776)		(776)		(699)
Total intangible assets, Net	$ 956		$ 956		$ 885