EARNINGS PER COMMON SHARE - Computation of Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Net income	$ 94	$ 87
Less: Preferred stock dividends	2	2
Net Income Available to Common Stockholders	$ 92	$ 85
Basic weighted average common shares outstanding (in shares)	324,640,715	323,740,956
Net effect of dilutive stock options, warrants and restricted stock (in shares)	1,188,119	2,026,012
Diluted weighted average common shares outstanding (in shares)	325,828,834	325,766,968
Earnings per common share:
Basic (in USD per share)	$ 0.28	$ 0.26
Diluted (in USD per share)	$ 0.28	$ 0.26

Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

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