INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income tax expense	$ 113	$ 114
Effective income tax rate	22.50%	26.40%
U.S. Federal income tax expense and tax rate	21.00%
Deferred taxes, net	$ 475		$ 571