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Variable Interest Entities Variable Interest Entity - Change in Fair Value of Assets and Liabilities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Fixed income securities, amortized cost | $ 2,197 | $ 2,041 |
Long-term debt | 508 | 639 |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 40 | 31 |
Variable Interest Entity Change in Fair Value of Assets and Liabilities | 4 | 0 | $ 4
Realized Investment Gains (Losses) | (22) | 31 | 7
Variable Interest Entity, Initial Consolidation, Gain (Loss) | 4 | 37 | 0
Variable Interest Entity, Measure of Activity, Income or Loss before Tax | 3 | 21 | 7
Assets | 8,428 | 7,973 | 12,303
Liabilities | 6,997 | 6,647 |
Variable Interest Entity [Member] |  |  |
Long-term debt | 2,967 | 3,107 |
Loans, Unpaid principal balance | 1,787 | 1,977 |
Long-term debt, Unpaid principal balance | 2,952 | 3,064 |
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, before Tax | 0 | (1) | 1
Gross Investment Income, Operating | 7 | (4) | 6
Realized Investment Gains (Losses) | 1 | 2 | 2
Interest Expense, Long-term Debt | (12) | (12) | (6)
Other Expenses | (1) | (1) | (1)
Assets | 4,394 | 4,054 |
Liabilities | 4,404 | 4,160 |
Other Comprehensive Income (Loss), Financial Liability, Fair Value Option, Reclassification Adjustment from AOCI for Derecognition, before Tax | $ 5 | $ (1) | $ 5

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- Definition Amount of realized gain (loss) on investment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 + Details
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- Definition Description of the amount of pre-tax income (loss) derived by the reporting entity from the Variable Interest Entity (VIE). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph d -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-6 + Details
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- Definition The gain (loss) recognized on initial consolidation of a variable interest entity (VIE) when the VIE is not a business (as defined). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481203/810-10-50-3 + Details
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