Equity Equity (Schedule of Stockholders Equity) (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 $ / shares shares	Dec. 31, 2014 shares	Jul. 19, 2016 USD ($)	Dec. 31, 2013 shares
Schedule of Stockholders Equity [Line Items]
Stockholders' Equity Note, Stock Split, Conversion Ratio			310
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,100,000,000	1,100,000,000	1,100,000,000.00
Common Stock, Shares, Issued	485,707,644	482,790,696	480,136,000		479,767,000
Stock Issued During Period, Shares, New Issues	2,917,000	2,655,000	369,000
Treasury Stock, Shares	(18,707,338)	(810,585)	(41,000)		0
Treasury Stock, Shares, Acquired	(17,897,000)	(769,000)	(41,000)
Common Stock, Shares, Outstanding	467,000,306	481,980,111	480,095,000
Stock Repurchase Program, Authorized Amount | $	$ 700			$ 700