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Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss,Net of Tax (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Accumulated other comprehensive loss | $ 2,761.5 | $ 2,698.5 | $ 2,857.6 | $ 2,446.4
Foreign currency translation |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Accumulated other comprehensive loss | (260.5) | (223.2) |  |
Translation gain (loss) on derivative instruments, net of income taxes of $(9.1) and $(12.9), respectively |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Accumulated other comprehensive loss | 13.1 | (4.7) |  |
Translation loss on long-term intercompany loans |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Accumulated other comprehensive loss | (121.5) | (137.2) |  |
Defined benefit pension plans and Retiree health care plan | Defined benefit pension plans, net of income taxes of $(30.9) and $(23.2), respectively |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Accumulated other comprehensive loss | (74.1) | (37.9) |  |
Defined benefit pension plans and Retiree health care plan | Retiree health care plan, net of income taxes of $1.6 and $2.0, respectively |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Accumulated other comprehensive loss | 2.0 | 3.2 |  |
Accumulated other comprehensive loss |  |  |  |
Accumulated Other Comprehensive Income Loss [Line Items] |  |  |  |
Accumulated other comprehensive loss | $ (441.0) | $ (399.8) | $ (288.2) | $ (426.1)

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