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Employee Benefit Plans (Expected Future Benefit Payments) (Details) - Pension Benefits [Member] $ in Millions | Dec. 31, 2018 USD ($)
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Summary of expected future benefit payments |
2018 | $ 19.3
2019 | 19.9
2020 | 25.8
2021 | 20.7
2022 | 23.5
2024-2028 | $ 147.1

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