Employee Benefit Plans (Components Of Net Pension Expense) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Service cost – benefits earned during the period	$ 18.6	$ 20.2	$ 37.3	$ 40.4
Interest cost on projected benefits	16.3	14.9	32.6	30.0
Expected return on plan assets	(34.3)	(33.9)	(68.6)	(67.9)
Net amortization and deferral	2.1	4.8	4.2	9.6
Net pension expense	$ 2.7	$ 6.0	$ 5.5	$ 12.1