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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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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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