Share-based Compensation (Tables)

12 Months Ended

Aug. 31, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock based awards granted

The following table summarizes the total awards granted:

	Stock Options/SARs	Restricted Stock Awards/Units	Performance Awards
2012 Grants	927,312	829,001	693,472
2011 Grants	112,000	690,180	686,548
2010 Grants	126,000	961,518	340,000

Combined information for shares subject to options and SARs excluding the cash component

Combined information for shares subject to options and SARs, excluding the cash component is as follows:

	Number		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Outstanding at August 31, 2011	2,807,498		$	27.45
Granted	828,463		11.63
Exercised	(361,478	)	12.34
Forfeited/Expired	(343,991	)	27.78
Outstanding at August 31, 2012	2,930,492		$	24.81	3.3 years	1,104,590
Exercisable at August 31, 2012	2,099,547		$	29.90	2.1 years	223,246

Valuation assumptions for stock options and SARs

The Black-Scholes pricing model was used for stock options and SARs and the following weighted average assumptions were used for grants in the years ended August 31:

	2012			2011			2010
Risk-free interest rate	0.43		%	0.59		%	0.86		%
Expected life, years	3.0			2.0			2.0
Expected volatility	59		%	56		%	80		%
Expected dividend yield	4.14		%	2.85		%	3.42		%
Weighted average grant-date fair value per share	$	3.67		$	4.63		$	5.43

Activity of restricted stock awards and PSUs excluding the cash component of PSUs

Information for restricted stock awards and PSUs (excluding the cash component of PSUs) is as follows:

	Number		Weighted Average Grant-Date Fair Value
Outstanding at August 31, 2011	2,394,140		$	13.44
Granted	489,118		10.68
Vested	(773,947	)	13.90
Forfeited	(425,739	)	10.56
Outstanding at August 31, 2012	1,683,572		$	13.16

Valuation assumptions for performance based awards

The binomial model was used for performance-based awards granted in 2010:

	2010
Risk-free interest rate	1.31	%
Expected life, years	3.0
Expected volatility	71	%
Expected dividend yield	—

Yearly activity of the stock purchase plan

Yearly activity of the stock purchase plan is as follows:

	2012		2011		2010
Shares subscribed	299,210		339,620		526,890
Price per share	$	11.85	$	14.34	$	13.63
Shares purchased	198,300		357,180		980,940
Price per share	$	11.76	$	13.63	$	7.94
Shares available for future issuance	4,342,704