GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets, Cost	$ 1,444		$ 1,444		$ 1,409
Intangible assets, Accumulated Amortization	(495)		(495)		(460)
Amortizing intangible assets, Net	949		949		949
Amortization expense	18	$ 17	35	$ 36
Remainder of 2017	36		36
Future Amortization Expense, 2018	67		67
Future Amortization Expense, 2019	67		67
Future Amortization Expense, 2020	66		66
Future Amortization Expense, 2021	60		60
Future Amortization Expense, 2022	57		57
Future Amortization Expense, Thereafter	360		360
Future Amortization Expense, Total	713		713
Intangible Assets Not Subject to Amortization - Tradenames [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets, Cost	235		235		235
Amortizing 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
Amortizing 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	1,004		$ 1,004		971
Intangible assets, Accumulated Amortization	(373)		(373)		(346)
Amortizing intangible assets, Net	631		$ 631		625
Noncompete Agreements [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			6 years
Intangible assets, Cost	7		$ 7		6
Intangible assets, Accumulated Amortization	(5)		(5)		(4)
Amortizing intangible assets, Net	2		$ 2		2
Technology [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			18 years
Intangible assets, Cost	94		$ 94		93
Intangible assets, Accumulated Amortization	(42)		(42)		(40)
Amortizing intangible assets, Net	52		$ 52		53
Other [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			9 years
Intangible assets, Cost	103		$ 103		103
Intangible assets, Accumulated Amortization	(75)		(75)		(70)
Amortizing intangible assets, Net	28		$ 28		33
Total Amortizing Intangible Assets [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period			18 years
Intangible assets, Cost	1,208		$ 1,208		1,173
Intangible assets, Accumulated Amortization	(495)		(495)		(460)
Amortizing intangible assets, Net	$ 713		$ 713		$ 713