STOCKHOLDER'S EQUITY - Treasury Stock (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
Equity, Class of Treasury Stock [Line Items]
Treasury stock, authorized amount	$ 1,000,000,000.0
Shares repurchased	229,200,000
August 2015 Stock Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Treasury stock, authorized amount		$ 500,000,000.0
Treasury stock, remaining authorized amount	$ 197,800,000
August 2014 Stock Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Treasury stock, authorized amount			$ 500,000,000.0