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Pension and Other Postretirement Benefits - Contributions to Plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Contributions to pension and other postretirement plans | $ 4.5 | $ 5.3
Pensions |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Contributions to pension and other postretirement plans | 3.5 | 3.8
Other postretirement benefits |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Contributions to pension and other postretirement plans | 1.0 | 1.3
Qualified Plan | Pensions | UNITED STATES |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Contributions to pension and other postretirement plans | 0.0 | 0.0
Nonqualified Plan | Pensions | UNITED STATES |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
Contributions to pension and other postretirement plans | $ 3.4 | $ 3.8

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