STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY (Retained Earnings) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended							12 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Dividends declared per share of common stock	$ 0.46	$ 0.46	$ 0.46	$ 0.46	$ 0.46	$ 0.46	$ 0.46	$ 1.38	$ 1.84	$ 1.72
Undistributed Earnings of Nonconsolidated Affiliates				$ 1,196				$ 1,731	$ 1,196