EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator (basic and diluted):
Net income	$ 190	$ 313	$ 399	$ 479
Less: Preferred stock dividends	0	0	0	0
Net income available to common stockholders	$ 190	$ 313	$ 399	$ 479
Denominator:
Weighted-average common shares outstanding - basic (in Shares)	537,729,248	559,998,324	541,986,653	559,998,324
Dilutive common shares: share-based awards (in Shares)	2,180,118	0	2,817,615	0
Weighted-average common shares outstanding - diluted (in Shares)	539,909,366	559,998,324	544,804,268	559,998,324
Earnings per common share:
Basic (in Dollars per Share)	$ 0.35	$ 0.56	$ 0.74	$ 0.86
Diluted (in Dollars per Share)	$ 0.35	$ 0.56	$ 0.73	$ 0.86