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Employee Benefit Plans (Asset Allocation Targets Reflecting a Percentage of Total Assets by Asset Class) (Details) | Dec. 31, 2023
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Minimum | Pension Benefits | U.S. Equities |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 0.00%
Minimum | Pension Benefits | International Equities |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 0.00%
Minimum | Pension Benefits | Fixed Maturities |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 53.00%
Minimum | Pension Benefits | Short-term Investments |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 0.00%
Minimum | Pension Benefits | Real Estate |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 3.00%
Minimum | Pension Benefits | Other invested assets |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 8.00%
Minimum | Postretirement | U.S. Equities |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 17.00%
Minimum | Postretirement | International Equities |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 3.00%
Minimum | Postretirement | Fixed Maturities |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 29.00%
Minimum | Postretirement | Short-term Investments |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 0.00%
Minimum | Postretirement | Real Estate |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 0.00%
Minimum | Postretirement | Other invested assets |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 0.00%
Maximum | Pension Benefits | U.S. Equities |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 3.00%
Maximum | Pension Benefits | International Equities |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 10.00%
Maximum | Pension Benefits | Fixed Maturities |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 71.00%
Maximum | Pension Benefits | Short-term Investments |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 11.00%
Maximum | Pension Benefits | Real Estate |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 18.00%
Maximum | Pension Benefits | Other invested assets |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 38.00%
Maximum | Postretirement | U.S. Equities |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 59.00%
Maximum | Postretirement | International Equities |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 21.00%
Maximum | Postretirement | Fixed Maturities |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 69.00%
Maximum | Postretirement | Short-term Investments |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 23.00%
Maximum | Postretirement | Real Estate |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 0.00%
Maximum | Postretirement | Other invested assets |
Defined Benefit Plan Disclosure [Line Items] |
Asset allocation targets | 0.00%

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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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