Share-Based Compensation and Postretirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Retirement Benefits [Abstract]
Share-based compensation expense	$ 121	$ 105
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost (credit)	41	37
Other Retiree Benefits
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost (credit)	$ (153)	$ (180)