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Benefit Plans, Amounts Recognized in Consolidated Balance Sheet (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Amounts recognized in Balance Sheet [Abstract] |  |
Current liability | $ (57.9) | $ (60.3)
Non-current liability | (114.3) | (179.0)
Pension Benefits [Member] |  |
Amounts recognized in Balance Sheet [Abstract] |  |
Current liability | (1.4) | (1.4)
Non-current liability | (112.2) | (174.7)
Recognized liability | (113.6) | (176.1)
Post-Retirement Benefits [Member] |  |
Amounts recognized in Balance Sheet [Abstract] |  |
Current liability | (0.2) | (0.3)
Non-current liability | (2.1) | (4.3)
Recognized liability | $ (2.3) | $ (4.6)

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