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Benefit Plans and Other Postretirement Benefits, Other (Details) - Pension Benefits - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Accumulated other comprehensive income (loss), before tax |  |  |  |
Net loss |  | $ 237.7 | $ 265.7 |
Net prior service cost |  | 7.7 | 10.5 |
Expected to be amortized from Accumulated other comprehensive loss over next fiscal year |  |  |  |
Net loss that will be amortized from Accumulated other comprehensive loss into net periodic benefit cost over the next fiscal year |  | 23.4 |  |
Prior service cost that will be amortized from Accumulated other comprehensive loss into net periodic benefit cost over the next fiscal year |  | 2.3 |  |
Defined Benefit Plan, Contributions |  |  |  |
Plan contributions by employer |  | 22.5 | 22.2 | $ 20.9
Estimated future employer contribution in next fiscal year |  | 90.0 |  |
Expected benefits payments |  |  |  |
2018 |  | 32.3 |  |
2019 |  | 32.9 |  |
2020 |  | 34.2 |  |
2021 |  | 37.0 |  |
2022 |  | 38.3 |  |
2023-2027 |  | 202.3 |  |
U.S. |  |  |  |
Accumulated other comprehensive income (loss), before tax |  |  |  |
Net loss |  | 167.7 | 194.7 |
Net prior service cost |  | 7.7 | 10.5 |
Defined Benefit Plan, Contributions |  |  |  |
Plan contributions by employer | $ 80.0 | 16.5 | 16.4 |
Expected benefits payments |  |  |  |
2018 |  | 24.8 |  |
2019 |  | 25.8 |  |
2020 |  | 26.9 |  |
2021 |  | 27.8 |  |
2022 |  | 28.9 |  |
2023-2027 |  | 151.2 |  |
International Plans |  |  |  |
Accumulated other comprehensive income (loss), before tax |  |  |  |
Net loss |  | 70.0 | 71.0 |
Defined Benefit Plan, Contributions |  |  |  |
Plan contributions by employer |  | 6.0 | 5.8 |
Expected benefits payments |  |  |  |
2018 |  | 7.5 |  |
2019 |  | 7.1 |  |
2020 |  | 7.3 |  |
2021 |  | 9.2 |  |
2022 |  | 9.4 |  |
2023-2027 |  | 51.1 |  |
Net liability |  |  |  |
Net liability for foreign subsidiaries with benefits under local statutory plans |  | $ 16.6 | $ 13.9 |

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