Business Combinations, Goodwill and Intangible Assets - Unaudited Proforma Information of Consolidated Results of Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Business Combinations Goodwill And Intangible Assets [Abstract]
Net sales	$ 741.0	$ 534.6	$ 1,380.3	$ 1,169.5
Net (loss) income	$ (14.2)	$ (38.8)	$ 3.5	$ (45.6)