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Stockholders' Equity Mandatory Convertible Preferred Stock (Details) - $ / shares					12 Months Ended
	Oct. 26, 2018	Jul. 18, 2018	Apr. 18, 2018	Jan. 17, 2018	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage					9.75%	9.75%
Preferred Stock, Liquidation Preference Per Share					$ 1,000	$ 1,000
9.75% Series A Mandatory Convertible, $1,000 per share liquidation preference
Class of Stock [Line Items]
Share issued (in shares)	1,600,000
Preferred Stock, Dividend Rate, Percentage	9.75%				9.75%
Preferred Stock, Liquidation Preference Per Share	$ 1,000
Preferred Stock, Dividends Per Share, Declared		$ 24.375	$ 24.375	$ 24.375
Common Stock [Member] | Mandatorily Redeemable Preferred Stock [Member]
Class of Stock [Line Items]
Conversion of Stock, Shares Converted					58,000,000

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