Pension And Other Postretirement Benefits (Details) (USD $) In Millions	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Defined Benefit Plan Disclosure [Line Items]
Required contributions made	$ 11.6
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5.6	5.7
Interest cost	12.3	11.6
Expected return on plan assets	(13.0)	(11.3)
Amortization of net loss	0.2	7.2
Amortization of prior service cost (benefit)	4.4	0.3
Net pension expense	9.5	13.5
Defined benefit pension plan, expected contributions	16.1
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.7	0.7
Interest cost	2.7	2.7
Expected return on plan assets	(1.6)	(1.3)
Amortization of net loss	0.6	1.5
Amortization of prior service cost (benefit)	(2.0)	(1.9)
Net pension expense	$ 0.4	$ 1.7