Future Policy Benefits (Details) (Narrative) - Americas [Member] - Other Segments - USD ($) $ in Millions	Jun. 30, 2025	Jun. 30, 2024
Life Insurance Product Line [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Changes In Cash Flow Assumptions	$ 0	$ 0
Liability for Future Policy Benefit, after Reinsurance	11,624	9,165
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	(788)	(741)
Insurance, Other
Liability for Future Policy Benefit, by Product Segment [Line Items]
Changes In Cash Flow Assumptions	0	0
Liability for Future Policy Benefit, after Reinsurance	8,415	6,388
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	$ (1,354)	$ (849)