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Fair Value - Carrying Value and Fair Value Classified by Level (Details) - Nonrecurring - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Carrying Value |  |
Assets: |  |
Mortgage loans | $ 918 | $ 902
Equity securities | 126 | 126
Liabilities: |  |
Investment contracts liabilities with a fixed maturity | 5 | 5
Investment contracts liabilities without a fixed maturity | 334 | 336
Long-term debt | 56,280 | 56,176
Estimated Fair Value |  |
Assets: |  |
Mortgage loans | 892 | 907
Liabilities: |  |
Investment contracts liabilities with a fixed maturity | 5 | 5
Investment contracts liabilities without a fixed maturity | 336 | 373
Long-term debt | 58,624 | 64,157
Level 1 | Estimated Fair Value |  |
Assets: |  |
Mortgage loans | 0 | 0
Liabilities: |  |
Investment contracts liabilities with a fixed maturity | 0 | 0
Investment contracts liabilities without a fixed maturity | 0 | 0
Long-term debt | 58,624 | 64,157
Level 2 | Estimated Fair Value |  |
Assets: |  |
Mortgage loans | 0 | 0
Liabilities: |  |
Investment contracts 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 | 892 | 907
Liabilities: |  |
Investment contracts liabilities with a fixed maturity | 5 | 5
Investment contracts liabilities without a fixed maturity | 336 | 373
Long-term debt | $ 0 | $ 0

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