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Employee Retirement Plans (Estimated Contributions and Benefit Payments) (Details) $ in Millions | Dec. 31, 2018 USD ($)
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Pension Benefits |
Defined Benefit Plan, Estimated Future Benefit Payments |
2019 | $ 40.4
2020 | 38.8
2021 | 38.0
2022 | 36.8
2023 | 35.3
2024 – 2028 | 160.7
Thereafter | 126.4
Total | 476.4
Qualified Plan |
Defined Benefit Plan Disclosure [Line Items] |
Expected employer contributions in next fiscal year | 4.7
Nonqualified Plan |
Defined Benefit Plan Disclosure [Line Items] |
Expected employer contributions in next fiscal year | $ 1.8

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