Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Oct. 06, 2017	Dec. 31, 2018	Dec. 31, 2019	Mar. 31, 2020	Apr. 14, 2017
Loss Contingencies [Line Items]
Claims settled	$ 399.0
Bankruptcy claims, undistributed amount returned	1.3
Bankruptcy claims amount of claims settled, make-whole fees	223.8
Bankruptcy claims amount of claims settled, postpetition interest	$ 175.2
Claims subject to Appellate Court decision				$ 240.0
Settlement Agreements
Loss Contingencies [Line Items]
Settlement agreement, amount claimants agreed to pay		$ 16.4	$ 13.5
Indebtedness Claims | Notes holders
Loss Contingencies [Line Items]
Claim reserve account after emergence from bankruptcy					$ 400.0