Equity - Textuals (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Equity (Textual) [Abstract]
Preferred Stock, Authorized	500,000,000	500,000,000
Preferred Stock, Par value	$ 0.01	$ 0.01
Preferred Stock, Issued	0	0
Preferred Stock, Outstanding	0	0
Noncontrolling interests	$ 252	$ 320
Repurchase of common stock	2,579,098
Repurchase of company common stock	$ 126
Stock repurchase program authorized amount	$ 3,000