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Investments (Mortgage Loans by Portfolio Segment) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Mortgage Loans, Gross | $ 84,290 | $ 79,860 |  |
Allowance for Credit Loss | (527) | (634) | $ (590) | $ (353)
Subtotal mortgage loans, net | 83,763 | 79,226 |  |
Mortgage loans (net of allowance for credit loss of $527 and $634, respectively; includes $0 and $127, respectively, under the fair value option) | $ 83,763 | $ 79,353 |  |
Percentage Of mortgage total recorded investment To Mortgage Loans On Real Estate Commercial And Consumer Net | 100.60% | 100.60% |  |
Percentage of Allowance for Credit Losses for Financing Receivables | 0.60% | 0.80% |  |
Percentage Of Mortgage Loans Held For Investment Net To Mortgage Loans On Real Estate Commercial And Consumer Net | 100.00% | 99.80% |  |
Percentage Of Loans And Leases Receivable Consumer Other To Mortgage Loans On Real Estate Commercial And Consumer Net | 0.00% | 0.20% |  |
Percentage Of Mortgage Loans On Real Estate To Mortgage Loans On Real Estate Commercial And Consumer Net | 100.00% | 100.00% |  |
Residential mortgage loans - FVO |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Residential — FVO | $ 0 | $ 127 |  |
Mortgage loans (net of allowance for credit loss of $527 and $634, respectively; includes $0 and $127, respectively, under the fair value option) | 0 | 127 |  |
Commercial Mortgage Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Mortgage Loans, Gross | 52,502 | 50,553 |  |
Allowance for Credit Loss | $ (218) | $ (340) | (252) | (246)
Percentage Of Mortgage Loans, Gross | 62.70% | 63.70% |  |
Residential Mortgage Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Mortgage Loans, Gross | $ 12,482 | $ 11,196 |  |
Allowance for Credit Loss | $ (190) | $ (206) | (232) | (55)
Percentage Of Mortgage Loans, Gross | 14.90% | 14.10% |  |
Agricultural Mortgage Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Mortgage Loans, Gross | $ 19,306 | $ 18,111 |  |
Allowance for Credit Loss | $ (119) | $ (88) | $ (106) | $ (52)
Percentage Of Mortgage Loans, Gross | 23.00% | 22.80% |  |

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