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Goodwill and Other Intangible Assets - Changes in Carrying Amount of Indefinite-Lived Intangible Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Indefinite-lived Intangible Assets [Line Items]    
Net carrying value $ 72.2 $ 62.7
Trade Names    
Indefinite-lived Intangible Assets [Line Items]    
Net carrying value $ 72.2 $ 62.7