Chapter 11 Filing, Going Concern and Other Related Matters Narrative (Details) $ in Millions			12 Months Ended	15 Months Ended
	Apr. 01, 2020 USD ($)	Feb. 25, 2019	Dec. 31, 2019	May 15, 2020 USD ($) claims
Bankruptcy Claims [Line Items]
Bankruptcy Proceedings, Date Petition for Bankruptcy Filed		Feb. 25, 2019
Bankruptcy Proceedings, Court Where Petition Was Filed			U.S. Bankruptcy Court for the Southern District of New York
Subsequent Event
Bankruptcy Claims [Line Items]
Bankruptcy Claims, Number Claims Filed | claims				8,250
Bankruptcy Claims, Amount of Claims Filed				$ 16,500
Senior Lien [Member] | Subsequent Event
Bankruptcy Claims [Line Items]
Plan of Reorganization, New Common Stock to be Distributed, Percent	100.00%
Exit Facility [Member] | Holders of Midwest Notes [Member] | Subsequent Event
Bankruptcy Claims [Line Items]
Plan of Reorganization, Planned Issuance of Debt	$ 100