Short-Term Financing - Narrative (Details) - USD ($)		12 Months Ended
		Jun. 30, 2023	Jun. 30, 2022
Short-term Debt [Line Items]
Line of credit facility, fair value of amount outstanding		$ 0	$ 0
Commercial paper		$ 0	0
Maturities of short-term funding agreements (up to)		5 days
Obligations under reverse repurchase agreements	[1]	$ 105,400,000	$ 136,400,000
364-Day Credit Agreement
Short-term Debt [Line Items]
Maximum borrowing capacity under credit facilities		$ 4,250,000,000
Term of credit		364 days
Credit Facility Expiring In June 2026
Short-term Debt [Line Items]
Maximum borrowing capacity under credit facilities		$ 3,200,000,000
Term of credit		5 years
Line of credit facility potentially available increase in maximum borrowing capacity		$ 500,000,000
Credit Facility Expiring In June 2028
Short-term Debt [Line Items]
Maximum borrowing capacity under credit facilities		$ 2,250,000,000
Term of credit		5 years
Line of credit facility potentially available increase in maximum borrowing capacity		$ 500,000,000
Commercial Paper
Short-term Debt [Line Items]
Maximum borrowing capacity under credit facilities		$ 9,700,000,000
Debt instrument, maturity period		364 days

[1] (A) As of June 30, 2023, $104.6 million of long-term marketable securities and $0.8 million of cash and cash equivalents have been pledged as collateral under the Company's reverse repurchase agreements. As of June 30, 2022, $14.3 million of short-term marketable securities and $122.1 million of long-term marketable securities have been pledged as collateral under the Company's reverse repurchase agreements (see Note 8).