EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Numerator (basic and diluted):
Net income	$ 320	$ 223
Less: Preferred stock dividends	7	7
Net income available to common stockholders	$ 313	$ 216
Denominator:
Weighted-average common shares outstanding - basic (in Shares)	509,451,450	528,070,648
Dilutive common shares: share-based awards (in Shares)	1,896,750	2,375,540
Weighted-average common shares outstanding - diluted (in Shares)	511,348,200	530,446,188
Earnings per common share:
Basic (in Dollars per Share)	$ 0.61	$ 0.41
Diluted (in Dollars per Share)	$ 0.61	$ 0.41
Share-based awards excluded from diluted earnings per share computation (in Shares)	321,803	0