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Postretirement Benefits Contributions, Benefit Payments and Other (Details) $ in Millions | Dec. 31, 2021 USD ($)
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Pension Plans [Member] |
Expected Benefit Payments [Abstract] |
Company Contributions Expected to be Made in 2017 | $ 2.8
2019 | 2.8
2020 | 2.8
2021 | 2.4
2022 | 2.3
2023 | 2.1
2024-2028 | 8.4
Other Postretirement Benefit Plans [Member] |
Expected Benefit Payments [Abstract] |
Company Contributions Expected to be Made in 2017 | 2.9
2019 | 2.9
2020 | 2.8
2021 | 2.6
2022 | 2.5
2023 | 2.3
2024-2028 | $ 9.6

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