Stockholders' Equity - Additional Detail (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Common stock, shares authorized	1,125,000,000.000	0
Common stock par value (usd per share)	$ 0.20	$ 0
Common stock shares outstanding (in shares)	423,000,000
Common stock shares issued (in shares)	423,000,000	0
Common shares unissued but encumbered (in shares)	34,000,000
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock shares outstanding (in shares)	3,300,000	0
Preferred stock dividend rate	6.97%
Preferred stock dividend rate (usd per share)	$ 3.485
Preferred stock liquidation preference (usd per share)	$ 50
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock shares outstanding (in shares)	4,000,000	0
Preferred stock liquidation preference (usd per share)	$ 100
Common Stock
Class of Stock [Line Items]
Common stock closing price (usd per share)	$ 8.31
3 Month LIBOR | Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock dividend rate	1.70%