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Pensions and Other Postretirement Benefits Estimated Future Benefit Payments (Details) $ in Millions | Dec. 31, 2018 USD ($)
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Pension Plan |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2019 | $ 90.1
2020 | 86.5
2021 | 87.0
2022 | 86.5
2023 | 85.6
2024-2028 | 415.8
Other Pension Plan |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |
2019 | 2.1
2020 | 2.0
2021 | 1.9
2022 | 1.8
2023 | 1.7
2024-2028 | $ 7.0

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