Employee Benefit Plans (Components Of Net Pension Expense) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Service cost – benefits earned during the period	$ 14.9	$ 14.9
Interest cost on projected benefits	15.4	19.7
Expected return on plan assets	(29.5)	(32.9)
Net amortization and deferral	1.6	0.1
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	(5.1)	15.3
Net pension expense	$ (2.7)	$ 17.1