Market Risk Benefits (Instrument Specific Credit Risk) (Details) - USD ($) $ in Millions		Jun. 30, 2024	Jun. 30, 2023
Market Risk Benefit [Line Items]
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk		$ (202)	$ (229)
Market Risk Benefit, Asset, Amount	[1]	15	6
Market Risk Benefit, Liability, Amount		217	235
Insurance, Other | Americas [Member] | Other Segments
Market Risk Benefit [Line Items]
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk		(202)	(229)
Market Risk Benefit, Asset, Amount	[1]	15	6
Market Risk Benefit, Liability, Amount		$ 217	$ 235

[1] Included in Other assets