Income Taxes (Reconciliation of U.S. Federal Statutory Rate To Effective Tax Rate) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Provision for taxes at U.S. statutory rate	$ 631.2	$ 640.5	$ 915.9
Provision for taxes at U.S. statutory rate, percent	21.00%	28.10%	35.00%
State taxes, net of federal tax benefit	$ 80.7	$ 58.1	$ 54.4
State taxes, net of federal tax benefit, percent	2.70%	2.50%	2.10%
U.S. tax on foreign income	$ 0.0	$ 12.0	$ 66.1
U.S. tax on foreign income, percent	0.00%	0.50%	2.50%
Utilization of foreign tax credits	$ 0.0	$ (19.6)	$ (76.0)
Utilization of foreign tax credits, percent	(0.00%)	(0.90%)	(2.90%)
Effective Income Tax Rate Reconciliation, Tax Settlement, Amount	$ 0.0	$ (31.9)	$ (33.2)
Effective Income Tax Rate Reconciliation, Tax Settlement, Percent	(0.00%)	(1.40%)	(1.30%)
Section 199 - Qualified production activities and research tax credit refund claim - net of reserves	$ 0.0	$ 0.0	$ (51.8)
Section 199 - Qualified production activities and research tax credit refund claim - net of reserves, percent	(0.00%)	(0.00%)	(2.00%)
Income Tax Reconciliation Resolution Of Tax Matters	$ 0.0	$ (33.3)	$ 0.0
Effective Income Tax Rate Reconciliation Resolution Of Tax Matters	0.00%	(1.50%)	0.00%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	$ 0.0	$ (253.3)	$ 0.0
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent	0.00%	(11.10%)	0.00%
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	$ (46.9)	$ 0.0	$ 0.0
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent	(1.60%)	0.00%	0.00%
Excess tax benefit - Stock-based compensation	$ (29.8)	$ (26.7)	$ (32.1)
Excess tax benefit - Stock-based compensation, percent	(1.00%)	(1.20%)	(1.20%)
Other	$ (16.2)	$ 51.9	$ (14.2)
Other, percent	(0.60%)	2.40%	(0.50%)
Provision for income taxes from continuing operations	$ 712.8	$ 397.7	$ 829.1
Effective Income Tax Rate, Continuing Operations	23.70%	17.40%	31.70%