DISCONTINUED OPERATIONS - Cash Flows from Discontinued Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net cash provided by (used in) operating activities	$ 196	$ 429	$ 399
Net cash provided by (used in) investing activities	$ 2,356	$ (118)	$ 581