Fair Value Of Financial Instruments (Tables)

3 Months Ended

12 Months Ended

Sep. 30, 2011

Jun. 30, 2011

Fair Value Of Financial Instruments [Abstract]

Summary Of Financial Assets And Liabilities Measured At Fair Value On Recurring Basis

	Level 1		Level 2		Level 3		Total
	($ in millions)
Assets
Cash and cash equivalents:
Money market funds	$	154.4	$	—	$	—	$	154.4
Other current assets:
Available-for-sale equity securities		2.0		—		—		2.0
Other non-current assets:
Available-for-sale equity securities		10.3		—		—		10.3
Total	$	166.7	$	—	$	—	$	166.7

	Level 1		Level 2		Level 3		Total
	($ in millions)
Assets
Cash and cash equivalents:
Money market funds	$	150.4	$	—	$	—	$	150.4
Other current assets:
Available-for-sale equity securities		2.0		—		—		2.0
Other non-current assets:
Available-for-sale equity securities		14.0		—		—		14.0
Total	$	166.4	$	—	$	—	$	166.4