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Lending Activities - Rollforward of the Changes in the Allowance for Credit Losses on Mortgage and Other Loans Receivable (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Changes in the allowance for losses on Mortgage and other loans receivable |  |  |  |  |
Allowance, beginning of period |  |  | $ 37,776 |  |
Allowance, end of period | $ 37,799 |  | 37,799 |  |
Commercial mortgage loans |  |  |  |  |
Changes in the allowance for losses on Mortgage and other loans receivable |  |  |  |  |
Allowance, beginning of period | 150 | $ 119 | 138 | $ 109 |
Loans charged off | 0 | (2) | 0 | (2) |
Net charge-offs | 0 | (2) | 0 | (2) |
Addition to (release of) allowance for loan losses | 12 | (1) | 24 | 9 |
Allowance, end of period | 162 | 116 | 162 | 116 |
Off-balance-sheet commitments | 5 | 13 | 5 | 13 | $ 9
Other Loans |  |  |  |  |
Changes in the allowance for losses on Mortgage and other loans receivable |  |  |  |  |
Allowance, beginning of period | 3 | 8 | 2 | 8 |
Loans charged off | 0 | 0 | 0 | 0 |
Net charge-offs | 0 | 0 | 0 | 0 |
Addition to (release of) allowance for loan losses | (2) | (5) | (1) | (5) |
Allowance, end of period | 1 | 3 | 1 | 3 |
Excluding AIGFP Operating |  |  |  |  |
Changes in the allowance for losses on Mortgage and other loans receivable |  |  |  |  |
Allowance, beginning of period | 153 | 127 | 140 | 117 |
Loans charged off | 0 | (2) | 0 | (2) |
Net charge-offs | 0 | (2) | 0 | (2) |
Addition to (release of) allowance for loan losses | 10 | (6) | 23 | 4 |
Allowance, end of period | $ 163 | $ 119 | $ 163 | $ 119 |

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 + Details
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- Definition Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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- Definition Amount, excluding accrued interest, of decrease (increase) in allowance for credit loss on financing receivable from writeoff (recovery). Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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- Definition Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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- Definition Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482454/460-10-45-1 + Details
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