Condensed Consolidated Statement of Shareholders’ Equity Statement (USD $) In Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Balances at beginning of period at Sep. 30, 2010	$ 242.9	$ 0.2	$ (0.1)	$ 184.6	$ 59.7	$ (3.1)	$ 1.6
Components of comprehensive income
Net income (loss)	29.6				29.8		(0.2)
Change in foreign currency translation	(0.2)					(0.2)
Change in unrealized loss on derivative instruments	1.1					1.1
Change in pension liabilities	0.3					0.3
Change in unrealized gain or loss on available-for-sale securities	(0.1)					(0.1)
Total comprehensive income	30.7
Redemption of fund units	(0.1)						(0.1)
Exercise of stock options	1.3			1.3
Stock-based Compensation	1.7			1.7
Debt Conversion, Converted Instrument, Amount	7.8			7.8
Balances at end of period at Jun. 30, 2011	$ 284.3	$ 0.2	$ (0.1)	$ 195.4	$ 89.5	$ (2.0)	$ 1.3