INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax expense	$ 165	$ 130	$ 423	$ 357
Effective income tax rate	32.20%	30.50%	30.00%	31.90%
U.S. Federal income tax expense and tax rate			35.00%	35.00%
Deferred taxes, net	$ 744		$ 744		$ 714
Unrecognized tax benefits	$ 7		$ 7		$ 42