GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Goodwill, balance at beginning of year	$ 5,905	$ 6,032
Goodwill acquired during the year	95	33	$ 383
Reclassification to assets held for sale	0	(160)
Goodwill, balance at end of year	6,000	5,905	$ 6,032
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets, gross excluding goodwill	1,409	1,377
Accumulated amortization, intangible assets	(460)	(393)
Total intangible assets, net	949	984
Future amortization expense, 2017	69
Future amortization expense, 2018	65
Future amortization expense, 2019	64
Future amortization expense, 2020	64
Future amortization expense, 2021	57
Future amortization expense, thereafter	394
Future amortization expense, total	713
Intangible Assets Not Subject to Amortization - Tradenames [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets, gross excluding goodwill	235	235
Total intangible assets, net	235	235
Intangible Assets Not Subject to Amortization - Other [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets, gross excluding goodwill	1	1
Total intangible assets, net	$ 1	1
Customer Relationships [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted average amortization period	18 years
Intangible assets, gross excluding goodwill	$ 971	936
Accumulated amortization, intangible assets	(346)	(296)
Total intangible assets, net	$ 625	640
Non-compete Agreements [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted average amortization period	6 years
Intangible assets, gross excluding goodwill	$ 6	6
Accumulated amortization, intangible assets	(4)	(3)
Total intangible assets, net	$ 2	3
Technology [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted average amortization period	18 years
Intangible assets, gross excluding goodwill	$ 93	93
Accumulated amortization, intangible assets	(40)	(35)
Total intangible assets, net	$ 53	58
Other Intangible Assets, Subject To Amortization [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted average amortization period	9 years
Intangible assets, gross excluding goodwill	$ 103	106
Accumulated amortization, intangible assets	(70)	(59)
Total intangible assets, net	$ 33	47
Total Amortizing Intangible Assets [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Weighted average amortization period	18 years
Intangible assets, gross excluding goodwill	$ 1,173	1,141
Accumulated amortization, intangible assets	(460)	(393)
Total intangible assets, net	$ 713	$ 748