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v3.22.4

Employee Benefit Plans (Narrative) (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 USD ($) pension_plan investment | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Defined Benefit Plan Disclosure [Line Items] |  |  |
Number of significant plans | pension_plan | 3 |  |
Pension benefit obligation (as a percent) | 84.00% |  |
Number of frozen plans | pension_plan | 1 |  |
Cash Surrender Value | $ | $ 2.8 | $ 2.8 | $ 2.8
Target allocation (as a percent) | 100.00% | 100.00% |
Number of investments | investment | 7 |  |
Expected employer contributions | $ | $ 5.0 |  |
Number of union sponsored multiemployer plans | pension_plan | 1 |  |
Withdrawal obligation | $ | $ 19.0 |  |
Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target allocation (as a percent) | 60.00% | 60.00% |
Mutual funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Number of investments | investment | 6 |  |
Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Average rate used to determine discount rate | 25.00% |  |
Other Postretirement Benefits Plan | Frozen Plans | Bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target allocation (as a percent) | 60.00% |  |
Other Postretirement Benefits Plan | Frozen Plans | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target allocation (as a percent) | 40.00% |  |
Other Postretirement Benefits Plan | Active Plans | Bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target allocation (as a percent) | 25.00% |  |
Other Postretirement Benefits Plan | Active Plans | Equities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target allocation (as a percent) | 75.00% |  |
Minimum | U.S. treasuries |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Maturities (term) | 20 years |  |
Maximum | U.S. treasuries |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Maturities (term) | 30 years |  |

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