Future Policy Benefits (Undiscounted and Discounted) (Details) - Other Segments - USD ($) $ in Millions	Jun. 30, 2026	Jun. 30, 2025
Americas [Member] \| Life Insurance Product Line [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	$ 85,097	$ 84,387
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	198,516	196,697
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	83,197	83,308
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	192,638	184,475
Americas [Member] \| Insurance, Other
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	3,197	1,645
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	25,853	22,386
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	13,028	10,816
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	5,138	2,601
CANADA \| Life Insurance Product Line [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	22,462	21,992
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	57,843	56,871
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	22,242	21,924
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	57,093	55,343
CANADA \| Insurance, Other
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	3,410	3,864
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	16,789	18,137
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	7,644	8,193
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	5,121	5,918
EMEA [Member] \| Life Insurance Product Line [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	18,137	16,626
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	33,958	30,625
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	17,871	16,197
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	33,287	30,549
EMEA [Member] \| Insurance, Other
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	81,984	75,159
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	182,279	160,718
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	90,458	82,029
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	167,946	148,624
Asia Pacific [Member] \| Life Insurance Product Line [Member]
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	49,957	45,709
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	124,436	109,518
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	42,427	38,866
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	130,491	113,413
Asia Pacific [Member] \| Insurance, Other
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance	3,528	3,778
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	42,941	30,889
Liability For Future Policy Benefit Expected Future Policy Benefit Discounted Before Reinsurance	17,609	15,147
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance	$ 5,682	$ 5,507

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Amount, before effect of reinsurance, of discounted balance for expected future gross premium component of liability for future policy benefit.

+ References

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Amount, before effect of reinsurance, of undiscounted balance for expected future gross premium component of liability for future policy benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147480081/944-40-50-6

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Amount, before effect of reinsurance, of undiscounted balance for expected future policy benefit and expense component of liability for future policy benefit.

+ References

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