Market Risk Benefits - Schedule of market risk benefits (Details) - USD ($) $ in Millions	Jun. 30, 2023	Jun. 30, 2022
Market Risk Benefit [Line Items]
Asset	$ 954	$ 642
Liability	4,977	5,302
Net	4,023	4,660
Individual Retirement
Market Risk Benefit [Line Items]
Asset	787	527
Liability	4,534	4,815
Net	3,747	4,288
Group Retirement
Market Risk Benefit [Line Items]
Asset	167	115
Liability	443	487
Net	$ 276	$ 372

Market Risk Benefit, Assets, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change

No definition available.

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- Definition

Market Risk Benefit, Liabilities, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change

+ References

No definition available.

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- Definition

Amount, after effect of reinsurance and cumulative increase (decrease) in instrument-specific credit risk, of contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 55
-Paragraph 29G
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480046/944-40-55-29G

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480016/944-40-65-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 7B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480081/944-40-50-7B

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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

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