INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income tax expense	$ 115	$ 85	$ 313	$ 317
Effective income tax rate	34.10%	30.80%	33.50%	32.20%
Federal income tax rate			35.00%	35.00%
Net deferred tax liability	$ 637		$ 637		$ 493