GOODWILL AND INTANGIBLE ASSETS (Schedules) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets, Cost	$ 2,025		$ 2,025		$ 1,967
Intangible assets, Accumulated Amortization	(853)		(853)		(800)
Total intangible assets, Net	1,172		1,172		1,167
Amortization expense	25	$ 25	52	$ 50
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2021	52		52
2022	102		102
2023	101		101
2024	98		98
2025	96		96
2026	91		91
Thereafter	396		396
Total	936		936
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	1,535		$ 1,535		1,479
Intangible assets, Accumulated Amortization	(682)		(682)		(638)
Total intangible assets, Net	853		$ 853		841
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			14 years
Intangible assets, Cost	143		$ 143		141
Intangible assets, Accumulated Amortization	(70)		(70)		(65)
Total intangible assets, Net	73		$ 73		76
Other
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			5 years
Intangible assets, Cost	108		$ 108		108
Intangible assets, Accumulated Amortization	(99)		(99)		(95)
Total intangible assets, Net	9		$ 9		13
Total Amortizing Intangible Assets
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			17 years
Intangible assets, Cost	1,789		$ 1,789		1,731
Intangible assets, Accumulated Amortization	(853)		(853)		(800)
Total intangible assets, Net	$ 936		$ 936		$ 931