Pension And Other Postretirement Benefits (Components Of The Net Periodic Benefit Cost) (Details) (USD $) In Millions	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Pension Plans [Member]
Service cost		$ 22.8	$ 21.0	$ 18.0
Interest cost		46.5	50.2	50.4
Expected return on plan assets		(45.4)	(45.0)	(60.9)
Amortization of net loss		29.1	27.0	9.7
Amortization of prior service cost (benefit)		1.0	1.1	1.1
Plan settlement expense		0.1		4.4
Net pension expense (income)	37.5	54.1	54.3	22.7
Other Postretirement Plans [Member]
Service cost		2.7	2.3	2.2
Interest cost		10.9	12.1	12.1
Expected return on plan assets		(5.0)	(4.6)	(6.2)
Amortization of net loss		6.0	5.0	2.1
Amortization of prior service cost (benefit)		(7.9)	(7.8)	(7.9)
Net pension expense (income)	$ 1.9	$ 6.7	$ 7.0	$ 2.3