Financing Arrangements (Details)	12 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Line of Credit Facility [Line Items]
Commercial paper notes outstanding	$ 723,500,000	$ 586,000,000
Debt to debt-shareholders' equity ratio	0.58
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	$ 786,000
Commercial Paper
Line of Credit Facility [Line Items]
Line of credit	2,500,000,000
Line of Credit | Amended And Extended Multi-Currency Credit Agreement
Line of Credit Facility [Line Items]
Line of credit	2,500,000,000
Line of credit available	$ 1,776,500,000
Extension option, term	1 year
Line of Credit
Line of Credit Facility [Line Items]
Weighted-average interest rate of notes payable	2.20%	2.80%