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Fair Value - Carrying Value and Fair Value Classified by Level (Details) - Nonrecurring - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Carrying Value |  |
Assets: |  |
Mortgage loans | $ 1,311 | $ 1,044
Equity securities | 534 | 411
Liabilities: |  |
Investment contract liabilities with a fixed maturity | 1 | 3
Investment contracts liabilities without a fixed maturity | 312 | 332
Long-term debt | 61,410 | 52,257
Carrying Value | Disposal Group, Held-for-sale, Not Discontinued Operations |  |
Liabilities: |  |
Long-term debt |  | 3
Estimated Fair Value |  |
Assets: |  |
Mortgage loans | 1,274 | 978
Liabilities: |  |
Investment contract liabilities with a fixed maturity | 1 | 3
Investment contracts liabilities without a fixed maturity | 279 | 305
Long-term debt | 58,451 | 47,653
Level 1 | Estimated Fair Value |  |
Assets: |  |
Mortgage loans | 0 | 0
Liabilities: |  |
Investment contract liabilities with a fixed maturity | 0 | 0
Investment contracts liabilities without a fixed maturity | 0 | 0
Long-term debt | 58,451 | 47,653
Level 2 | Estimated Fair Value |  |
Assets: |  |
Mortgage loans | 0 | 0
Liabilities: |  |
Investment contract liabilities with a fixed maturity | 0 | 0
Investment contracts liabilities without a fixed maturity | 0 | 0
Long-term debt | 0 | 0
Level 3 | Estimated Fair Value |  |
Assets: |  |
Mortgage loans | 1,274 | 978
Liabilities: |  |
Investment contract liabilities with a fixed maturity | 1 | 3
Investment contracts liabilities without a fixed maturity | 279 | 305
Long-term debt | $ 0 | $ 0

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