Stockholders' Equity - Mandatory Convertible Preferred Stock (Details) - $ / shares		12 Months Ended
	Oct. 26, 2018	Dec. 31, 2018
9.75% Series A Mandatory Convertible, $1,000 per share liquidation preference
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)	1,600,000
Preferred Stock, Dividend Rate, Percentage	9.75%
Preferred Stock, Liquidation Preference Per Share	$ 1,000
Common stock
Class of Stock [Line Items]
Mandatory conversion of preferred shares (shares)		58,000,000
Common stock | Mandatorily Redeemable Preferred Stock
Class of Stock [Line Items]
Mandatory conversion of preferred shares (shares)		58,000,000