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Postretirement Plans - Schedule of Actual Allocations for Pension Assets and Target Allocations by Asset Class (Details) - Pension | Dec. 31, 2023 | Dec. 31, 2022
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Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, actual plan asset allocations | 100.00% | 100.00%
Defined benefit plan, target plan asset allocations | 100.00% | 100.00%
Fixed income |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, actual plan asset allocations | 60.00% | 63.00%
Defined benefit plan, target plan asset allocations | 59.00% | 63.00%
Global equity |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, actual plan asset allocations | 19.00% | 14.00%
Defined benefit plan, target plan asset allocations | 20.00% | 20.00%
Private equity |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, actual plan asset allocations | 8.00% | 8.00%
Defined benefit plan, target plan asset allocations | 7.00% | 4.00%
Real estate and real assets |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, actual plan asset allocations | 7.00% | 8.00%
Defined benefit plan, target plan asset allocations | 7.00% | 7.00%
Hedge funds |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, actual plan asset allocations | 6.00% | 7.00%
Defined benefit plan, target plan asset allocations | 7.00% | 6.00%

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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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