EQUITY (Details 2) - USD ($) $ / shares in Units, shares in Millions, $ in Millions							1 Months Ended	3 Months Ended		6 Months Ended
	Mar. 15, 2016	Feb. 04, 2016	Dec. 15, 2015	Oct. 30, 2015	Sep. 15, 2015	Aug. 14, 2015	Jan. 29, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Class of Stock
Cash dividends declared per common share (in dollars per share)								$ 0.3	$ 0.24	$ 0.54	$ 0.44
Purchase of Class A Common Stock (in dollars)										$ 575.0
Common Class A
Class of Stock
Cash dividends declared per common share (in dollars per share)		$ 0.30		$ 0.30		$ 0.24
Dividends paid (in dollars per share)			$ 0.30		$ 0.24
Purchase of Class A Common Stock (in shares)							0.9			7.6
Purchase of Class A Common Stock (in dollars)							$ 75.0			$ 627.8
Common Class A | Forecast
Class of Stock
Dividends paid (in dollars per share)	$ 0.30
Common Class B
Class of Stock
Cash dividends declared per common share (in dollars per share)		$ 0.30		$ 0.30		$ 0.24
Dividends paid (in dollars per share)			$ 0.30		$ 0.24
Conversion of Class B to Class A (in shares)										0.4
Common Class B | Forecast
Class of Stock
Dividends paid (in dollars per share)	$ 0.30