Goodwill and Identifiable Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,294.9	$ 1,208.9
Goodwill from acquisitions	372.8
Purchase accounting adjustments	(0.4)
Foreign currency translation	(74.6)	86.0
Goodwill, ending balance	1,592.7	1,294.9
Performance Coatings
Goodwill [Roll Forward]
Goodwill, beginning balance	1,211.3	1,130.9
Goodwill from acquisitions	372.8
Purchase accounting adjustments	(0.4)
Foreign currency translation	(70.3)	80.4
Goodwill, ending balance	1,513.4	1,211.3
Mobility Coatings
Goodwill [Roll Forward]
Goodwill, beginning balance	83.6	78.0
Goodwill from acquisitions	0.0
Purchase accounting adjustments	0.0
Foreign currency translation	(4.3)	5.6
Goodwill, ending balance	$ 79.3	$ 83.6

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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