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Shareholders' Equity - Components of Accumulated Other Comprehensive Loss, Net of Tax (Parenthetical) (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
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Translation loss on derivative instruments, net of income tax benefit of $(9.8) and $(16.4), respectively |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Accumulated other comprehensive loss, income taxes | $ (9.8) | $ (16.4)
Defined benefit pension plans and Retiree health care plan | Defined benefit pension plans, net of income tax benefit of $(22.7) and $(22.8), respectively |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Accumulated other comprehensive loss, income taxes | (22.7) | (22.8)
Defined benefit pension plans and Retiree health care plan | Retiree health care plan, net of income taxes of $1.6 on both dates |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Accumulated other comprehensive loss, income taxes | $ 1.6 | $ 1.6

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