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Chapter 11 Proceedings and Ability to Continue as a Going Concern - Schedule of Reorganization Items (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Reorganizations [Abstract]
Debtor Reorganization Items, Net Gain (Loss) on Rejection of Leases and Other Executory Contracts	$ 0.5
Reorganization items (non-cash)	0.5
Professional fees	47.8
Debtor Reorganization Items, Provision for Expected Allowed Claims	3.9
Reorganization items (fees)	51.7
Total reorganization items, net	52.2	$ 0.0
Reorganization items (fees) unpaid	35.8
Reorganization items (fees) paid	$ 15.9

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- Definition

Amount of reorganization items related to legal and advisory professional fees related to entities in bankruptcy.

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