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Shareholders' Equity - Components of Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | --- | --- | --- | ---
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Accumulated other comprehensive loss | $ 1,995.2 | $ 2,104.9 | $ 2,126.9 | $ 2,145.9 | $ 2,187.7 | $ 2,234.1
Gain on interest rate swap, net of income taxes of $0.2 on both dates |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Accumulated other comprehensive loss | 0.6 |  | 0.8 |  |  |
Defined benefit pension plans, net of income tax benefit of $(20.6) on both dates |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Accumulated other comprehensive loss | (8.9) |  | (8.9) |  |  |
Retiree health care plan, net of income taxes of $ 2.0 and $2.1, respectively |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Accumulated other comprehensive loss | 1.2 |  | 1.5 |  |  |
Foreign currency translation |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Accumulated other comprehensive loss | (196.4) |  | (342.2) |  |  |
Translation loss on long-term intercompany loans, net of income taxes of $19.2 and $19.1, respectively |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Accumulated other comprehensive loss | (133.9) |  | (133.2) |  |  |
(Loss) gain on derivative instruments, net of income tax benefit of $(44.9) and $(0.7), respectively |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Accumulated other comprehensive loss | (113.5) |  | 39.0 |  |  |
Accumulated other comprehensive loss |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |  |
Accumulated other comprehensive loss | $ (450.9) | $ (447.1) | $ (443.0) | $ (500.4) | $ (495.5) | $ (466.0)

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