Debt - Emergence Revolving Credit Facility (Details) - Exit Credit Agreement $ in Millions	Feb. 05, 2021 USD ($)
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Debtor-in-possession financing, amount arranged	$ 675.0
Debtor-in-possession financing, borrowings outstanding	177.5
Revolving Credit Facility | Letter of Credit
Debt Instrument [Line Items]
Debtor-in-possession financing, letters of credit outstanding	8.8
Letter of Credit | Line of Credit
Debt Instrument [Line Items]
Debtor-in-possession financing, amount arranged	$ 67.5