GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets, Cost	$ 1,747		$ 1,747		$ 1,653
Intangible assets, Accumulated Amortization	(579)		(579)		(534)
Total intangible assets, Net	1,168		1,168		1,119
Amortization expense	22	$ 19	66	$ 54
Remainder of 2018	23		23
Future Amortization Expense, 2019	90		90
Future Amortization Expense, 2020	89		89
Future Amortization Expense, 2021	83		83
Future Amortization Expense, 2022	79		79
Future Amortization Expense, 2023	79		79
Future Amortization Expense, Thereafter	489		489
Future Amortization Expense, Total	932		932
Intangible Assets Not Subject to Amortization - Tradenames [Member]
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 [Member]
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 [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			18 years
Intangible assets, Cost	1,309		$ 1,309		1,210
Intangible assets, Accumulated Amortization	(458)		(458)		(404)
Total intangible assets, Net	851		$ 851		806
Noncompete Agreements [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			8 years
Intangible assets, Cost	3		$ 3		7
Intangible assets, Accumulated Amortization	(2)		(2)		(5)
Total intangible assets, Net	1		$ 1		2
Technology [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			16 years
Intangible assets, Cost	107		$ 107		95
Intangible assets, Accumulated Amortization	(48)		(48)		(45)
Total intangible assets, Net	59		$ 59		50
Other [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			10 years
Intangible assets, Cost	92		$ 92		105
Intangible assets, Accumulated Amortization	(71)		(71)		(80)
Total intangible assets, Net	21		$ 21		25
Total Amortizing Intangible Assets [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			17 years
Intangible assets, Cost	1,511		$ 1,511		1,417
Intangible assets, Accumulated Amortization	(579)		(579)		(534)
Total intangible assets, Net	$ 932		$ 932		$ 883