Segments - Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBIT	$ 120.1	$ 182.4	$ 421.9	$ 249.8
Interest expense, net	33.8	39.8	100.7	112.4
Debt extinguishment and refinancing related costs	0.0	0.0	0.2	2.4
Termination benefits and other employee related costs	9.6	35.7	35.1	70.4
Strategic review and retention costs	2.1	6.9	9.7	25.1
Acquisition and divestiture-related costs	9.2	0.1	10.8	0.3
Impairment (benefits) charges	(0.8)	0.3	(0.8)	3.5
Pension special events	0.0	(0.7)	0.0	(2.5)
Accelerated depreciation	0.6	0.4	1.8	8.9
Indemnity (income) loss	(0.1)	0.3	(0.2)	0.3
Operational matter	(18.7)	0.0	3.9	0.0
Brazil indirect tax	0.0	0.0	(8.3)	0.0
Gain on sale of facility	(8.9)	0.0	(8.9)	0.0
Income before income taxes	93.3	99.6	277.9	29.0
Performance Coatings
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBIT	122.8	133.9	379.7	214.8
Mobility Coatings
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Adjusted EBIT	$ (2.7)	$ 48.5	$ 42.2	$ 35.0
Minimum
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Retention payment terms			18 months
Maximum
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Retention payment terms			24 months