STOCKHOLDERS' EQUITY - Share Repurchases and Dividends (Details) - USD ($) $ / shares in Units, shares in Millions		3 Months Ended				9 Months Ended		23 Months Ended
	Oct. 11, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Sep. 06, 2017	May 30, 2017	Feb. 28, 2017	Feb. 17, 2015
Stockholders' Equity Note [Abstract]
Stock repurchase program, authorized amount									$ 225,000,000	$ 280,000,000	$ 350,000,000	$ 200,000,000
Shares repurchased								$ 131,000,000
Treasury stock acquired (in shares)						22.3
Treasury stock acquired, cost method						$ 770,200,000
Subsequent Event [Line Items]
Dividends declared (in dollars per share)		$ 0.08	$ 0.08	$ 0.08	$ 0.07	$ 0.24	$ 0.21
Subsequent Event
Subsequent Event [Line Items]
Dividends declared (in dollars per share)	$ 0.08