Employee Benefit Plans (Components Of Net Pension Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Retirement Benefits [Abstract]
Service cost – benefits earned during the period	$ 1.2	$ 14.9	$ 3.6	$ 44.8
Interest cost on projected benefits	12.8	15.5	38.3	46.3
Expected return on plan assets	(30.4)	(29.5)	(91.1)	(88.4)
Net amortization and deferral	2.5	1.9	7.5	4.8
Settlement charges and special termination benefits	0.0	(17.0)	5.8	(22.1)
Net pension (income)/expense	$ (13.9)	$ (14.2)	$ (35.9)	$ (14.6)