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Goodwill and Intangibles - Indefinite Lived Intangible Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Indefinite-lived Intangible Assets [Line Items]    
Changes to the carrying amount of indefinite-lived intangible asset $ 0.0 $ 0.0
MGU | Trade name    
Indefinite-lived Intangible Assets [Line Items]    
Indefinite-lived intangible asset $ 5.7