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Investments - Components of Net Realized Gains and Losses (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Components of net realized capital gains (losses) |  |
Sales of fixed maturity securities | $ (262) | $ (101)
Net realized gains (losses) | (103) | (87)
Excluding Fortitude Re Funds Withheld Assets |  |
Components of net realized capital gains (losses) |  |
Net realized gains (losses) | (60) | (59)
Fortitude Re Funds Withheld Assets |  |
Components of net realized capital gains (losses) |  |
Net realized gains (losses) | (43) | (28)
Excluding modified coinsurance and funds withheld embedded derivative |  |
Components of net realized capital gains (losses) |  |
Sales of fixed maturity securities | (262) | (101)
Change in allowance for credit losses on fixed maturity securities | 8 | (1)
Foreign exchange transactions | 226 | 56
All other derivatives and hedge accounting | (34) | (46)
Sales of alternative investments | 0 | 9
Other | (9) | 15
Net realized gains (losses) | (62) | (78)
Excluding modified coinsurance and funds withheld embedded derivative | Loans Receivable |  |
Components of net realized capital gains (losses) |  |
Change in allowance for credit losses on loans | 9 | (10)
Excluding modified coinsurance and funds withheld embedded derivative | Excluding Fortitude Re Funds Withheld Assets |  |
Components of net realized capital gains (losses) |  |
Sales of fixed maturity securities | (255) | (86)
Change in allowance for credit losses on fixed maturity securities | 8 | (1)
Foreign exchange transactions | 220 | 59
All other derivatives and hedge accounting | (28) | (48)
Sales of alternative investments | 0 | 10
Other | (10) | 15
Net realized gains (losses) | (60) | (59)
Excluding modified coinsurance and funds withheld embedded derivative | Excluding Fortitude Re Funds Withheld Assets | Loans Receivable |  |
Components of net realized capital gains (losses) |  |
Change in allowance for credit losses on loans | 5 | (8)
Excluding modified coinsurance and funds withheld embedded derivative | Fortitude Re Funds Withheld Assets |  |
Components of net realized capital gains (losses) |  |
Sales of fixed maturity securities | (7) | (15)
Change in allowance for credit losses on fixed maturity securities | 0 | 0
Foreign exchange transactions | 6 | (3)
All other derivatives and hedge accounting | (6) | 2
Sales of alternative investments | 0 | (1)
Other | 1 | 0
Net realized gains (losses) | (2) | (19)
Excluding modified coinsurance and funds withheld embedded derivative | Fortitude Re Funds Withheld Assets | Loans Receivable |  |
Components of net realized capital gains (losses) |  |
Change in allowance for credit losses on loans | 4 | (2)
Fortitude Re funds withheld embedded derivative |  |
Components of net realized capital gains (losses) |  |
Net realized gains (losses) | (41) | (9)
Fortitude Re funds withheld embedded derivative | Excluding Fortitude Re Funds Withheld Assets |  |
Components of net realized capital gains (losses) |  |
Net realized gains (losses) | 0 | 0
Fortitude Re funds withheld embedded derivative | Fortitude Re Funds Withheld Assets |  |
Components of net realized capital gains (losses) |  |
Net realized gains (losses) | $ (41) | $ (9)

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- Definition Amount, excluding accrued interest, of increase (decrease) in allowance for credit loss of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-9 + Details
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- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-9 + 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 The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)(h)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(7)(a)(7)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(7)(a)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(7)(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(7)(a)(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1 + Details
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