Preferred Stock - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Equity [Abstract]
Preferred Series A dividends payable	$ 22.9		$ 22.9		$ 22.9
Preferred stock dividend paid	22.9		$ 68.8
Accrued preferred dividends payable date			Nov. 14, 2019
Deemed dividends on Series A Preferred Stock	$ 8.4	$ 7.4	$ 24.4	$ 21.5