Employee Benefit Plans (Components Of Net Pension Expense) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Service cost – benefits earned during the period	$ 14.9	$ 14.9	$ 29.9	$ 29.9
Interest cost on projected benefits	15.4	19.7	30.9	39.3
Expected return on plan assets	(29.5)	(33.0)	(59.0)	(65.9)
Net amortization and deferral	1.5	0.0	2.9	0.1
Settlement charges and special termination benefits	0.0	12.8	(5.1)	28.1
Net pension expense	$ 2.3	$ 14.4	$ (0.4)	$ 31.5