Employee Benefit Plans (Components Of Net Pension Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Retirement Benefits [Abstract]
Service cost - benefits earned during the period	$ 59.7	$ 59.8	$ 74.6
Interest cost on projected benefits	61.8	78.6	65.4
Expected return on plan assets	(117.9)	(131.8)	(137.5)
Net amortization and deferral	6.8	0.1	8.4
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	(22.0)	48.7	319.5
Net pension expense	(11.6)	$ 55.4	$ 330.4
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	$ 17.0