Fair Value Measurements (Tables)

3 Months Ended

12 Months Ended

Sep. 30, 2011

Jun. 30, 2011

Fair Value Measurements [Abstract]

Schedule Of Fair Value Of Assets And Liabilities Measured On Recurring Basis

September 30, 2011	Fair Value Measurements Using Input Type
(in millions)	Level 1		Level 2		Total
Assets:
Marketable securities
Municipal auction rate securities	$	—	$	5.1	$	5.1
Derivative financial instruments		—		4.8		4.8
Total assets	$	—	$	9.9	$	9.9
Liabilities:
Derivative financial instruments	$	—	$	50.9	$	50.9

June 30, 2011	Fair Value Measurements Using Input Type
(in millions)	Level 1		Level 2		Total
Assets:
Marketable securities
Government agency bonds	$	13.7	$	—	$	13.7
Corporate bonds		15.1		—		15.1
Commercial paper		1.7		—		1.7
Municipal auction rate securities		—		5.3		5.3
Derivative financial instruments		—		20.0		20.0
Total assets	$	30.5	$	25.3	$	55.8
Liabilities:
Derivative financial instruments	$	—	$	14.1	$	14.1

Estimated Fair Values Of Financial Instruments

	September 30, 2011				June 30, 2011
($ in millions)	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt, including current portion	$	407.9	$	426.0	$	507.8	$	515.9
Company-owned life insurance	$	10.3	$	10.3	$	11.4	$	11.4