Income Taxes (Reconciliation of U.S. Federal Statutory Rate To Effective Tax Rate) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Provision for taxes at U.S. statutory rate	$ 931.9	$ 798.9	$ 705.9
State taxes, net of federal tax benefit	111.2	91.8	67.2
Foreign rate differential	33.1	41.3	34.0
Excess tax benefit - Stock-based compensation	(19.0)	(19.9)	(8.8)
Other	(31.6)	(56.9)	(35.6)
Total provision for income taxes	$ 1,025.6	$ 855.2	$ 762.7
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Provision for taxes at U.S. statutory rate, percent	21.00%	21.00%	21.00%
State taxes, net of federal tax benefit, percent	2.50%	2.40%	2.00%
Foreign rate differential, percent	0.70%	1.10%	1.00%
Excess tax benefit - Stock-based compensation, percent	(0.40%)	(0.50%)	(0.20%)
Other, percent	(0.70%)	(1.50%)	(1.10%)
Provision for income taxes from continuing operations, percent	23.10%	22.50%	22.70%