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Stock-Based Compensation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation			$ 16.1	$ 22.2
Tax benefits on stock-based compensation expense	$ 0.5	$ 0.7	0.2	2.9
To be settled with stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense (income)	2.5	2.4	12.6	16.3
Employee contributions for above stock plans	1.1	2.0	3.5	5.9
Total stock-based compensation	3.6	4.4	16.1	22.2
Tax benefits on stock-based compensation expense	0.6	0.6	3.0	4.0
To be settled with stock | Tax (expense)/benefits on stock-based compensation payments
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefits on stock-based compensation expense	(0.1)	0.1	(2.8)	(1.1)
To be settled with stock | Restricted Stock Unit awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense (income)	0.0	0.8	7.4	10.0
To be settled with stock | All other stock plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense (income)	2.5	1.6	5.2	6.3
To be settled in cash
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense (income)	0.7	0.4	1.9	0.0
To be settled in cash | Restricted Stock Unit awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense (income)	0.0	0.0	0.0	0.0
To be settled in cash | All other stock plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense (income)	$ 0.7	$ 0.4	$ 1.9	$ 0.0

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