Goodwill and Other Intangible Assets - Schedule of Goodwill and Intangible Assets (Parenthetical) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Total intangible assets
Goodwill, accumulated impairment loss	$ 644.2	$ 644.2
Tradenames
Total intangible assets
Indefinite-lived, accumulated impairment loss	$ 139.5	$ 139.5