Fair Value (Tables)

12 Months Ended

Sep. 30, 2011

Fair Value [Abstract]

Assets And Liabilities Measured At Fair Value On A Recurring Basis

	Fair Value Measurement Using
Type of Instruments	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Balance
(In millions)
Assets at September 30, 2011:
Money market funds	$	1.3	$	—		$	—		$	1.3
Option to purchase a company		—		—			1.4			1.4
Corporate debt security		—		—			19.2			19.2
Total assets measured at fair value	$	1.3	$	—		$	20.6		$	21.9
Liabilities at September 30, 2011:
Derivative liabilities	$	—	$	—		$	—		$	—
Contingent consideration		—		—			(0.1	)		(0.1	)
Total liabilities measured at fair value	$	—	$	—		$	(0.1	)	$	(0.1	)
Assets at October 1, 2010:
Money market funds	$	36.4	$	—		$	—		$	36.4
Total assets measured at fair value	$	36.4	$	—		$	—		$	36.4
Liabilities at October 1, 2010:
Derivative liabilities	$	—	$	(0.5	)	$	—		$	(0.5	)
Total liabilities measured at fair value	$	—	$	(0.5	)	$	—		$	(0.5	)

	Fair Value Measurement Using
Line Item in Consolidated Balance Sheet	Quoted Prices in Active Markets for Identical Instruments (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Balance
(In millions)
Assets at September 30, 2011:
Cash and cash equivalents	$	0.2	$	—		$	—		$	0.2
Short-term investment		—		—			19.2			19.2
Other assets		1.1		—			1.4			2.5
Total assets measured at fair value	$	1.3	$	—		$	20.6		$	21.9
Liabilities at September 30, 2011:
Accrued liabilities	$	—	$	—		$	—		$	—
Other long-term liabilities		—		—			(0.1	)		(0.1	)
Total liabilities measured at fair value	$	—	$	—		$	(0.1	)	$	(0.1	)
Assets at October 1, 2010:
Cash and cash equivalents	$	35.3	$	—		$	—		$	35.3
Other assets		1.1		—			—			1.1
Total assets measured at fair value	$	36.4	$	—		$	—		$	36.4
Liabilities at October 1, 2010:
Accrued liabilities	$	—	$	(0.5	)	$	—		$	(0.5	)
Total liabilities measured at fair value	$	—	$	(0.5	)	$	—		$	(0.5	)

Reconciliation For Assets And Liabilities Measured And Recorded At Fair Value On A Recurring Basis

(In millions)	Corporate Debt Security		Option to Purchase  a Company		Contingent Consideration
Balance at October 1, 2010	$	—	$	—	$	—
Total gains and losses (realized and unrealized):
Included in selling, general and administrative expenses		—		—		0.4
Purchases, sales, issuances, and settlements, net		19.2		1.4		(0.5	)
Balance at September 30, 2011	$	19.2	$	1.4	$	(0.1	)