Segments - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Net sales	$ 1,088.6	$ 1,026.9	$ 3,279.0	$ 2,663.1
Depreciation and amortization expense	79.3	80.4	234.7	243.6
Intercompany sales between segments	0.0	0.0	0.0	0.0
Performance Coatings
Segment Reporting Information [Line Items]
Net sales	779.2	682.7	2,292.3	1,812.5
Depreciation and amortization expense	57.0	57.4	167.4	175.3
Mobility Coatings
Segment Reporting Information [Line Items]
Net sales	309.4	344.2	986.7	850.6
Depreciation and amortization expense	22.3	23.0	67.3	68.3
Refinish | Performance Coatings
Segment Reporting Information [Line Items]
Net sales	443.4	401.7	1,305.5	1,031.4
Industrial | Performance Coatings
Segment Reporting Information [Line Items]
Net sales	335.8	281.0	986.8	781.1
Light Vehicle | Mobility Coatings
Segment Reporting Information [Line Items]
Net sales	235.4	276.3	758.2	662.7
Commercial Vehicle | Mobility Coatings
Segment Reporting Information [Line Items]
Net sales	$ 74.0	$ 67.9	$ 228.5	$ 187.9