Equity and Accumulated Other Comprehensive Loss, Net (Redemption of Series E Preferred Stock Narrative) (Details) - Series E Preferred Stock and Unit - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Sep. 15, 2016	Dec. 31, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Preferred stock, shares outstanding (in shares)	11,500,000	0	11,500,000
Preferred stock, dividend rate	7.00%	7.00%	7.00%
Preferred stock, redemption price per share (in dollars per share)	$ 25.35972
Preferred stock, liquidation preference per share/unit (in dollars per share)	$ 25.00	$ 25	$ 25
Redemption premium	$ 10.3	$ 10.3