Derivative Instruments and Hedging Activities - Protection Purchased with CDS (Details) - Protection Purchased - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Credit Derivatives
Notional	$ 395,000	$ 348,000
CDS
Credit Derivatives
Fair Value Asset (Liability)	321	(2,352)
Single name
Credit Derivatives
Notional	138,000	126,000
Fair Value Asset (Liability)	433	(1,338)
Index and basket
Credit Derivatives
Notional	235,000	204,000
Fair Value Asset (Liability)	228	(563)
Tranched index and basket
Credit Derivatives
Notional	22,000	18,000
Fair Value Asset (Liability)	$ (340)	$ (451)

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No definition available.

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- 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5708775-113959

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

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