STOCKHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Preferred Stock
Preferred stock, authorized (in shares)	100,000,000		100,000,000		100,000,000
Preferred stock, outstanding (in shares)	250,000		250,000		250,000
Preferred stock, par value (in dollars per share)	$ 25.00		$ 25.00		$ 25.00
Treasury Stock
Treasury stock purchased	$ 225	$ 250	$ 485	$ 250
Treasury stock purchased (in shares)			13,588,304