Share-Based Compensation - Pre-Tax Compensation Cost (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax share-based compensation expense	$ 8.2	$ 5.8	$ 26.2	$ 20.0
Income tax benefit	(1.1)	(1.2)	(2.4)	(2.4)
Total share-based compensation expense, net of income taxes	7.1	4.6	23.8	17.6
Restructuring expenses and asset impairments	0.0	0.0	0.0	(0.6)
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax share-based compensation expense	0.7	0.3	1.8	1.1
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax share-based compensation expense	7.5	5.5	24.4	19.5
Stock options expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax share-based compensation expense	0.6	1.1	3.7	4.3
Restricted stock expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax share-based compensation expense	4.5	3.3	11.0	8.8
Cash-settled restricted stock expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax share-based compensation expense	2.1	0.6	4.3	1.2
Performance share units expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pre-tax share-based compensation expense	$ 1.0	$ 0.8	$ 7.2	$ 5.7

Share-Based Payment Arrangement, Benefit

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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