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Benefit Plans, Contributions (Details) $ in Millions | Dec. 31, 2020 USD ($)
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Pension Benefits [Member] |
Defined Benefit Plan, Expected Future Employer Contributions [Abstract] |
Expected company contribution in 2021 | $ 11.3
Post-Retirement Benefits [Member] |
Defined Benefit Plan, Expected Future Employer Contributions [Abstract] |
Expected company contribution in 2021 | $ 0.3

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