INCOME TAXES - RECONCILIATION OF UNRECOGNIZED TAX BENEFITS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Unrecognized Tax Benefits
Balance at the beginning of the period	$ 51	$ 72	$ 151
Additions based on tax positions related to the current year	9	6	9
Additions based on acquisitions	2	10
Additions based on tax positions related to prior years	374	1	16
Reductions for tax positions of prior years		(14)	(12)
Settlement or clarification from tax authorities	(1)	(6)	(79)
Expiration of statute of limitations	(9)	(5)	(1)
Foreign currency translation	(17)	(13)	(12)
Balance at the end of the period	$ 409	$ 51	$ 72