Stockholders' Equity - Additional Information (Details) - USD ($)		12 Months Ended
	May 05, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 29, 2017
Class of Stock [Line Items]
Common stock, shares authorized (in shares)		1,125,000,000	1,125,000,000
Common stock, par value (in dollars per share)		$ 0.20	$ 0.20
Common stock shares outstanding (in shares)		432,000,000
Common shares unissued but encumbered (in shares)		46,000,000
Common stock dividends		$ 0	$ 0	$ 0
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock shares outstanding (in shares)	3,300,000.0	0	3,300,000
Preferred stock dividend rate (as a percentage)		6.97%
Preferred stock dividend rate (in dollars per share)	$ 50
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock shares outstanding (in shares)		4,000,000	4,000,000
Preferred stock liquidation preference (in dollars per share)		$ 100
Common Stock
Class of Stock [Line Items]
Share price (in dollars per share)					$ 11.30
Three Month LIBOR | Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock dividend rate (as a percentage)		1.70%