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Pension and Postretirement Benefit Plans (Narrative) (Details) $ in Millions | 9 Months Ended
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Sep. 30, 2022 USD ($)
Amortization of prior service cost |
Defined Benefit Plan Disclosure [Line Items] |
Revision of prior service cost estimate | $ 24.4
Pension benefits |
Defined Benefit Plan Disclosure [Line Items] |
Employer contributions | 26.3
Estimated minimum contributions | 34.2
Postretirement Health Coverage |
Defined Benefit Plan Disclosure [Line Items] |
Employer contributions | 1.2
Estimated minimum contributions | $ 1.5

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