Derivative Instruments - Credit Derivatives, Protection Sold, Notional and Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Protection sold credit derivatives ratings/maturity profile
Protection sold credit derivatives ratings/maturity profile - less than 1 year	$ (243,962)	$ (190,662)
Protection sold credit derivatives ratings/maturity profile - from 1-5 years	(531,993)	(405,320)
Protection sold credit derivatives ratings/maturity profile - more than 5 years	(224,128)	(32,148)
Total notional amount	(1,000,083)	(628,130)
Credit Derivatives, Protection Sold
Protection sold credit derivatives ratings/maturity profile
Fair value of receivables	9,681	8,408
Fair value of payables	(5,277)	(2,993)
Net fair value	4,404	5,415
Investment grade
Protection sold credit derivatives ratings/maturity profile
Protection sold credit derivatives ratings/maturity profile - less than 1 year	(200,344)	(146,799)
Protection sold credit derivatives ratings/maturity profile - from 1-5 years	(406,289)	(314,100)
Protection sold credit derivatives ratings/maturity profile - more than 5 years	(176,221)	(28,117)
Total notional amount	(782,854)	(489,016)
Investment grade \| Credit Derivatives, Protection Sold
Protection sold credit derivatives ratings/maturity profile
Fair value of receivables	5,294	4,969
Fair value of payables	(2,423)	(908)
Net fair value	2,871	4,061
Non-investment grade
Protection sold credit derivatives ratings/maturity profile
Protection sold credit derivatives ratings/maturity profile - less than 1 year	(43,618)	(43,863)
Protection sold credit derivatives ratings/maturity profile - from 1-5 years	(125,704)	(91,220)
Protection sold credit derivatives ratings/maturity profile - more than 5 years	(47,907)	(4,031)
Total notional amount	(217,229)	(139,114)
Non-investment grade \| Credit Derivatives, Protection Sold
Protection sold credit derivatives ratings/maturity profile
Fair value of receivables	4,387	3,439
Fair value of payables	(2,854)	(2,085)
Net fair value	$ 1,533	$ 1,354

Protection sold credit derivativesratings(a)/maturity profile.

No definition available.

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- Definition

Protection sold on credit derivatives and credit-related notes; ratings/maturity profile for maturities for more than five years.

+ References

No definition available.

+ Details

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- Definition

Protection sold on credit derivatives and credit-related notes; ratings/maturity profile for maturities from one to five years.

+ References

No definition available.

+ Details

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- Definition

Protection sold on credit derivatives and credit- related notes; ratings/maturity profile for maturities less than one year.

+ References

No definition available.

+ Details

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- Definition

Maximum potential amount of future undiscounted payments that could be required under the credit derivative, before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4K
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4K

+ Details

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- Definition

Fair value of credit risk derivative asset.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4K
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4K

+ Details

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- Definition

Fair value of credit risk derivative liability.

+ References

+ Details

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- Definition

Fair value of credit risk derivative asset after deduction of credit risk derivative liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4K
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4K

+ Details

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