EQUITY - Class of Stock and Dividend Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions							3 Months Ended		6 Months Ended
	Mar. 15, 2017	Feb. 01, 2017	Dec. 15, 2016	Nov. 01, 2016	Sep. 15, 2016	Aug. 18, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Class of Stock
Cash dividends declared per common share (in dollars per share)							$ 0.34	$ 0.30	$ 0.64	$ 0.54
Purchase of Class A Common Stock (in dollars)									$ 307
Common Class A and Common Class B
Class of Stock
Cash dividends declared per common share (in dollars per share)		$ 0.34		$ 0.34		$ 0.30
Dividends paid (in dollars per share)			$ 0.34		$ 0.30
Common Class A and Common Class B | Forecast
Class of Stock
Dividends paid (in dollars per share)	$ 0.34
Common Class A
Class of Stock
Purchase of Class A Common Stock (in shares)									4.1
Purchase of Class A Common Stock (in dollars)									$ 363
Common Class B
Class of Stock
Conversion of Class B to Class A (in shares)									0.6