Goodwill and Identifiable Intangible Assets - Schedule of Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,592.7
Purchase accounting adjustments	2.3
Foreign currency translation	(96.9)
Goodwill, ending balance	1,498.1
Performance Coatings
Goodwill [Roll Forward]
Goodwill, beginning balance	1,513.4
Purchase accounting adjustments	2.3
Foreign currency translation	(92.8)
Goodwill, ending balance	1,422.9
Mobility Coatings
Goodwill [Roll Forward]
Goodwill, beginning balance	79.3
Purchase accounting adjustments	0.0
Foreign currency translation	(4.1)
Goodwill, ending balance	$ 75.2