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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Discontinued Operations - Additional Information (Details) - MCC Business - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Discontinued Operations, Disposed of by Sale
Discontinued Operations
Overhead expenses previously allocated	$ 30.4
Discontinued Operations, Held-for-sale
Discontinued Operations
Overhead expenses previously allocated		$ 33.6	$ 35.1