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Deferred Policy Acquisition Costs - Life Deferred Acquisition Costs Rollforward by Product (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Movement Analysis of Deferred Policy Acquisition Costs |  |  |
Deferred policy acquisition costs asset, beginning of period | $ 1,013 | $ 916 | $ 838
Deferred Policy Acquisition Cost, Capitalization | 1,530 | 1,427 | 1,254
Deferred Policy Acquisition Costs, Amortization Expense | (1,450) | (1,330) | (1,176)
Deferred policy acquisition costs asset, end of period | 1,093 | 1,013 | 916
Term Life Insurance |  |  |
Movement Analysis of Deferred Policy Acquisition Costs |  |  |
Deferred policy acquisition costs asset, beginning of period | 228 | 215 | 201
Deferred Policy Acquisition Cost, Capitalization | 30 | 34 | 35
Deferred Policy Acquisition Costs, Amortization Expense | (22) | (21) | (21)
Deferred policy acquisition costs asset, end of period | 236 | 228 | 215
Whole Life Insurance |  |  |
Movement Analysis of Deferred Policy Acquisition Costs |  |  |
Deferred policy acquisition costs asset, beginning of period | 43 | 38 | 35
Deferred Policy Acquisition Cost, Capitalization | 8 | 7 | 5
Deferred Policy Acquisition Costs, Amortization Expense | (3) | (2) | (2)
Deferred policy acquisition costs asset, end of period | 48 | 43 | 38
Deferred Fixed Annuity |  |  |
Movement Analysis of Deferred Policy Acquisition Costs |  |  |
Deferred policy acquisition costs asset, beginning of period | 7 | 7 | 6
Deferred Policy Acquisition Cost, Capitalization | 2 | 1 | 1
Deferred Policy Acquisition Costs, Amortization Expense | (1) | (1) | 0
Deferred policy acquisition costs asset, end of period | 8 | 7 | 7
Universal Life |  |  |
Movement Analysis of Deferred Policy Acquisition Costs |  |  |
Deferred policy acquisition costs asset, beginning of period | 53 | 54 | 54
Deferred Policy Acquisition Cost, Capitalization | 2 | 2 | 2
Deferred Policy Acquisition Costs, Amortization Expense | (3) | (3) | (2)
Deferred policy acquisition costs asset, end of period | 52 | 53 | 54
Life Insurance Segment |  |  |
Movement Analysis of Deferred Policy Acquisition Costs |  |  |
Deferred policy acquisition costs asset, beginning of period | 331 | 314 | 296
Deferred Policy Acquisition Cost, Capitalization | 42 | 44 | 43
Deferred Policy Acquisition Costs, Amortization Expense | (29) | (27) | (25)
Deferred policy acquisition costs asset, end of period | $ 344 | $ 331 | $ 314

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- Definition Amount of deferred policy acquisition cost capitalized on contract remaining in force. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 65 -Paragraph 2 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480016/944-40-65-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479432/944-30-50-2B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479401/944-30-55-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(7)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 45 -Paragraph 1 -SubTopic 825 -Topic 944 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479408/944-825-45-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479432/944-30-50-2B + Details
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