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Derivative Financial Instruments - Effect of Qualifying Hedge Accounting (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Net investment income | $ 583 | $ 506 | $ 1,727 | $ 1,553
Net gains (losses) | (21) | (14) | (96) | 25
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | 20 | (145) | (28) | 28
Interest rate contracts | Net gains (losses) |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | 4 | (129) | (73) | 36
Interest rate contracts | Designated as Hedging Instrument | Net investment income |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge | 0 | 0 | 0 | 0
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0
Interest rate contracts | Designated as Hedging Instrument | Net gains (losses) |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge | 0 | 7 | 0 | 8
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | (7) | 0 | (8)
Interest rate contracts | Cash Flow Hedging | Designated as Hedging Instrument |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | 0 | 0 | 0 | 0
Foreign exchange contracts | Net gains (losses) |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net | 2 | (1) | 7 | (4)
Foreign exchange contracts | Designated as Hedging Instrument |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, Net | 1 | 0 | 2 | 1
Foreign exchange contracts | Designated as Hedging Instrument | Net investment income |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge | 0 | 0 | 0 | 0
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 0 | 0 | 0 | 0
Foreign exchange contracts | Designated as Hedging Instrument | Net gains (losses) |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge | 1 | 3 | 14 | 1
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | 1 | (4) | (12) | 0
Foreign exchange contracts | Cash Flow Hedging | Designated as Hedging Instrument |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | 1 | 5 | 4 | 11
Foreign exchange contracts | Cash Flow Hedging | Designated as Hedging Instrument | Net investment income |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | 1 | 2 | 4 | 7
Foreign exchange contracts | Cash Flow Hedging | Designated as Hedging Instrument | Net gains (losses) |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax | $ 0 | $ 3 | $ 0 | $ 4

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- Definition Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476148/220-40-50-21 + Details
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- Definition Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 182 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-182 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147476148/220-40-50-21 + Details
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