Financing Arrangements (Details)	12 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)
Line of Credit Facility [Line Items]
Commercial paper notes outstanding	$ 2,100,000,000	$ 1,800,000,000
Debt to debt-shareholders' equity ratio	0.47
Maximum
Line of Credit Facility [Line Items]
Debt to debt-shareholders' equity ratio, covenant, maximum	0.65
International
Line of Credit Facility [Line Items]
Short-term borrowings	$ 0	$ 0
Commercial Paper
Line of Credit Facility [Line Items]
Line of credit	3,000,000,000.0
Line of Credit | Amended And Extended Multi-Currency Credit Agreement
Line of Credit Facility [Line Items]
Line of credit	3,000,000,000.0
Line of credit available	$ 900,000,000
Extension option, term	1 year
Line of Credit
Line of Credit Facility [Line Items]
Weighted-average interest rate of notes payable	5.50%	5.60%