Market Risk Benefits (Instrument Specific Credit Risk) (Details) - USD ($) $ in Millions		Jun. 30, 2025	Jun. 30, 2024
Market Risk Benefit [Line Items]
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk		$ (216)	$ (202)
Market Risk Benefit, Asset, Amount	[1]	17	15
Market Risk Benefit, Liability, Amount		233	217
Insurance, Other | Americas [Member] | Other Segments
Market Risk Benefit [Line Items]
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk		(216)	(202)
Market Risk Benefit, Asset, Amount	[1]	17	15
Market Risk Benefit, Liability, Amount		$ 233	$ 217

[1] Included in Other assets.