v3.22.4

Pension and Other Postretirement Benefits - Plan Asset Allocations (Details) - Pension benefits​ | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Plan asset, weighted average asset allocations | 100.00% | 100.00%
Equities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan asset, weighted average asset allocations | 22.00% | 31.00%
Equities | Maximum |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Policy maximum | 40.00% |
Fixed income |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan asset, weighted average asset allocations | 62.00% | 56.00%
Fixed income | Maximum |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Policy maximum | 100.00% |
Other investments |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan asset, weighted average asset allocations | 16.00% | 13.00%
Other investments | Maximum |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Policy maximum | 30.00% |

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