Consolidated Statements of Total Equity (USD $) In Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income	Non-controlling Interests
Beginning Balances at Sep. 30, 2008	$ 2,864.8	$ 3.2	$ 1,716.3	$ 1,210.5	$ (95.7)	$ 0	$ 30.5
Net income (loss)	(549.8)			(549.8)
Issuances under employee benefit plans (155,254 shares in 2009, 107,952 shares in 2010, 91,350 shares in 2011)	1.2		1.2
Exercise of stock options (665,357 shares in 2009, 1,234,396 shares in 2010, 303,535 shares in 2011)	3.2		3.2
Stock based compensation expense	13.7		13.7
Equity component of convertible senior notes	136.7		136.7
Cash dividends declared	(47.5)			(47.5)
Noncontrolling interests	(21.7)						(21.7)
Ending Balances at Sep. 30, 2009	2,400.6	3.2	1,871.1	613.2	(95.7)	0	8.8
Net income (loss)	245.1			245.1
Issuances under employee benefit plans (155,254 shares in 2009, 107,952 shares in 2010, 91,350 shares in 2011)	1.1		1.1
Exercise of stock options (665,357 shares in 2009, 1,234,396 shares in 2010, 303,535 shares in 2011)	9.3		9.3
Stock based compensation expense	13.3		13.3
Cash dividends declared	(47.7)			(47.7)
Other comprehensive income (loss)	0.3					0.3
Noncontrolling interests	0.9						0.9
Ending Balances at Sep. 30, 2010	2,622.9	3.2	1,894.8	810.6	(95.7)	0.3	9.7
Net income (loss)	71.8			71.8
Issuances under employee benefit plans (155,254 shares in 2009, 107,952 shares in 2010, 91,350 shares in 2011)	0.9		0.9
Exercise of stock options (665,357 shares in 2009, 1,234,396 shares in 2010, 303,535 shares in 2011)	2.5		2.5
Stock issued under Performance Unit Plan (369,818 shares)	4.6		4.6
Stock based compensation expense	14.2		14.2
Cash dividends declared	(47.8)			(47.8)
Treasury stock purchases (3,544,838 shares)	(38.6)				(38.6)
Other comprehensive income (loss)	(0.2)					(0.2)
Noncontrolling interests	(6.8)						(6.8)
Ending Balances at Sep. 30, 2011	$ 2,623.5	$ 3.2	$ 1,917.0	$ 834.6	$ (134.3)	$ 0.1	$ 2.9