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Contracts Accounted for as Credit Derivatives - Credit Derivatives Net Par Outstanding by Sector (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Net Par Outstanding on Credit Derivatives
Net Par Outstanding	$ 3,608	$ 3,203
Net Fair Value Asset (Liability)	(50)	(162)
Expected Loss to be recovered	2	3
Public finance | U.S.
Net Par Outstanding on Credit Derivatives
Net Par Outstanding	1,149	1,175
Net Fair Value Asset (Liability)	(15)	(79)
Public finance | Non U.S.
Net Par Outstanding on Credit Derivatives
Net Par Outstanding	1,522	1,565
Net Fair Value Asset (Liability)	(20)	(58)
Structured finance | U.S.
Net Par Outstanding on Credit Derivatives
Net Par Outstanding	322	342
Net Fair Value Asset (Liability)	(13)	(22)
Structured finance | Non U.S.
Net Par Outstanding on Credit Derivatives
Net Par Outstanding	615	121
Net Fair Value Asset (Liability)	$ (2)	$ (3)

X

- Definition

Expected Loss on Credit Derivative to Be Paid (Recovered), Including Representation and Warranty Liability (Benefit)

+ References

No definition available.

+ Details

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- References

No definition available.

+ Details

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- Definition

Represents the outstanding principal amounts of the underlying insured obligations that are accounted for as credit derivatives, net of protection purchased.

+ References

No definition available.

+ Details

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X

- Definition

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

+ References

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

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