Long-Term Debt (Narrative) (Details) - USD ($)	2 Months Ended	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2023	Jun. 30, 2022	Apr. 30, 2021
Debt Instrument [Line Items]
Repayments of senior debt	$ 0	$ 0	$ 500,000,000	$ 650,000,000
Long-term debt, maturities, repayments of principal in year three		350,000,000
Long-term debt, maturities, repayments of principal in year six		500,000,000
Long-term debt, maturities, repayments of principal in year eleven		$ 650,000,000
2030 Senior Notes | Senior Notes
Debt Instrument [Line Items]
Interest rate		3.875%
Senior Notes, 2.500%, due July 2028 | Senior Notes
Debt Instrument [Line Items]
Interest rate		2.50%
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 1,500,000,000
Available increase in borrowing capacity		$ 500,000,000
Maximum quarterly debt-to-EBITDA ratio		3.50
Maximum annual debt-to-EBITDA ratio		4.50
Minimum interest coverage ratio		2.50
Swingline Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 175,000,000
Standby Letters of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 50,000,000