Derivatives and Hedge Accounting - Balance sheet location (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Derivatives designated as hedging instruments
Derivative [Line Items]
Carrying amount of hedged assets	$ 4,000	$ 4,000
Derivative, amount of hedged item	2,700	2,700
Cumulative basis adjustment associated with hedging relationships	(11)	(7)
Fixed maturities, available-for-sale, at fair value
Derivative [Line Items]
Carrying amount of hedged assets	11,316	11,984
Commercial mortgage and other loans
Derivative [Line Items]
Carrying amount of hedged assets	0	0
Policyholder contract deposits
Derivative [Line Items]
Carrying amount of hedged liabilities	(13,627)	(13,022)
Cumulative Amount of Fair Value Hedging Adjustments Included In the Carrying Amount of the Hedged Assets Liabilities \| Fixed maturities, available-for-sale, at fair value
Derivative [Line Items]
Carrying amount of hedged assets	(11)	(7)
Cumulative Amount of Fair Value Hedging Adjustments Included In the Carrying Amount of the Hedged Assets Liabilities \| Commercial mortgage and other loans
Derivative [Line Items]
Carrying amount of hedged assets	(18)	(19)
Cumulative Amount of Fair Value Hedging Adjustments Included In the Carrying Amount of the Hedged Assets Liabilities \| Policyholder contract deposits
Derivative [Line Items]
Carrying amount of hedged liabilities	$ 3	$ (48)

Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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- Definition

Amount of asset hedged in fair value hedging relationship.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

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

+ Details

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- Definition

Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk. Excludes cumulative basis adjustment related to foreign exchange risk.

+ References

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

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

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- Definition

Amount of liability hedged in fair value hedging relationship.

+ References

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

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