Financing Arrangements (Details) $ in Millions		12 Months Ended
	Aug. 21, 2025 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)
Line of Credit Facility [Line Items]
Commercial paper notes outstanding		$ 1,800	$ 2,100
Debt to debt-shareholders' equity ratio		0.41
Maximum
Line of Credit Facility [Line Items]
Debt to debt-shareholders' equity ratio, covenant, maximum		0.65
Notes Payable
Line of Credit Facility [Line Items]
Weighted-average interest rate of notes payable (as percent)		4.60%	5.50%
Non-US
Line of Credit Facility [Line Items]
Outstanding borrowings		$ 10	$ 0
Commercial Paper
Line of Credit Facility [Line Items]
Line of credit		3,000
Commercial Paper | Subsequent Event
Line of Credit Facility [Line Items]
Line of credit	$ 3,750
Amended And Extended Multi-Currency Credit Agreement | Line of Credit
Line of Credit Facility [Line Items]
Line of credit		3,000
Line of credit available for borrowings		$ 1,200
Extension option, term (in years)		1 year
Amended And Extended Multi-Currency Credit Agreement | Line of Credit | Subsequent Event
Line of Credit Facility [Line Items]
Line of credit	3,750
Increase in line of credit	$ 750