Share-Based Compensation Plans (Tables)

12 Months Ended

Aug. 31, 2011

Share-Based Compensation Plan [Abstract]

Stock based awards granted

	Stock		Restricted Stock		Performance
	Options/SARs		Awards/Units		Awards
2011 Grants		112,000		690,180		686,548
2010 Grants		126,000		961,518		340,000
2009 Grants		126,000		—		403,000

Activity of stock options and SARs

						Weighted
				Weighted		Average
				Average		Remaining
				Exercise		Contractual Life		Aggregate
	Number			Price		(Years)		Intrinsic Value
Outstanding at August 31, 2010		3,922,016		$	23.67
Granted		112,000			16.83
Exercised		(854,023	)		8.03
Forfeited/Expired		(372,495	)		28.96
Outstanding at August 31, 2011		2,807,498		$	27.45		2.8	$	94,500
Exercisable at August 31, 2011		2,639,498		$	28.19		2.8	$	94,500

Weighted average assumptions for grants

	2011			2010			2009
Risk-free interest rate		0.59	%		0.86	%		1.24	%
Expected life, years		2.0			2.0			3.9
Expected volatility		56	%		80	%		60	%
Expected dividend yield		2.85	%		3.42	%		1.1	%
Weighted average grant-date fair value per share	$	4.63		$	5.43		$	4.69

Activity of restricted stock awards and PSUs

				Weighted Average
				Grant-Date
	Shares			Fair Value
Outstanding at August 31, 2010		1,649,985		$	12.54
Granted		1,033,454		$	15.55
Vested		(162,042	)		18.06
Forfeited		(127,257	)		13.01
Outstanding at August 31, 2011		2,394,140		$	13.44

Binomial model used for performance based awards granted

	2010			2009
Risk-free interest rate		1.31	%		1.37	%
Expected life, years		3.0			2.6
Expected volatility		71	%		69	%
Expected dividend yield		—			2.9	%

Yearly Activity of The Stock Purchase Plan

	2011		2010		2009
Shares subscribed		339,620		526,890		1,234,080
Price per share	$	14.34	$	13.63	$	7.94
Shares purchased		357,180		980,940		7,530
Price per share	$	13.63	$	7.94	$	9.90
Shares available for future issuance		4,519,374