Equity and Accumulated Other Comprehensive Loss, Net (Forward Equity Sale) (Details) - USD ($) $ in Billions	Sep. 27, 2016	Jun. 02, 2016	May 20, 2016	Mar. 31, 2017	Dec. 31, 2016
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Common stock shares issued (shares)				159,539,892	159,019,118
Forward equity sale
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
Common stock subject to forward sale agreements (shares)				2,375,000
Forward equity sale | Common Stock
Equity and Accumulated Other Comprehensive Income (Loss) [Line Items]
New issues of stock during period (shares)		14,375,000	12,500,000
New issues of stock during period, underwriters option (shares)		1,875,000
Common stock shares issued (shares)	12,000,000
Gross proceeds from the issuance of common stock	$ 1.1