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Investments (Mortgage Loans by Portfolio Segment) (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Mortgage Loans, Gross | $ 82,408 | $ 79,860 |  |
Allowance for Credit Loss | (486) | (634) | $ (570) | $ (590)
Subtotal mortgage loans, net | 81,922 | 79,226 |  |
Total mortgage loans held-for-investment, net | 82,031 | 79,353 |  |
Mortgage loans held-for-sale | 24 | 0 |  |
Mortgage loans (net of allowance for credit loss of $486 and $634, respectively; includes $109 and $127, respectively, under the fair value option and $24 and $0, respectively, of mortgage loans held-for-sale) | $ 82,055 | $ 79,353 |  |
Percentage Of mortgage total recorded investment To Mortgage Loans On Real Estate Commercial And Consumer Net | 100.40% | 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 | 99.80% | 99.80% |  |
Percentage Of Loans And Leases Receivable Consumer Other To Mortgage Loans On Real Estate Commercial And Consumer Net | 0.20% | 0.20% |  |
Percentage of total mortgage loans held-for-investments | 100.00% | 100.00% |  |
Percentage of mortgage loans held-for-sale | 0.00% | 0.00% |  |
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] |  |  |  |
Total mortgage loans held-for-investment, net | $ 109 | $ 127 |  |
Mortgage loans (net of allowance for credit loss of $486 and $634, respectively; includes $109 and $127, respectively, under the fair value option and $24 and $0, respectively, of mortgage loans held-for-sale) | 109 | 127 |  |
Commercial Mortgage Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Mortgage Loans, Gross | 52,348 | 50,553 |  |
Allowance for Credit Loss | $ (205) | $ (340) | (274) | (252)
Percentage Of Mortgage Loans, Gross | 63.80% | 63.70% |  |
Residential Mortgage Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Mortgage Loans, Gross | $ 11,497 | $ 11,196 |  |
Allowance for Credit Loss | $ (174) | $ (206) | (210) | (232)
Percentage Of Mortgage Loans, Gross | 14.00% | 14.10% |  |
Agricultural Mortgage Loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Mortgage Loans, Gross | $ 18,563 | $ 18,111 |  |
Allowance for Credit Loss | $ (107) | $ (88) | $ (86) | $ (106)
Percentage Of Mortgage Loans, Gross | 22.60% | 22.80% |  |

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