Stock-Based Compensation (Tables)

9 Months Ended

May 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Option and Stock Appreciation Right Activity

The following table summarizes shares available for grant and stock option and stock appreciation right activity from August 31, 2012 through May 31, 2013:


	Shares Available for Grant			Options Outstanding			Aggregate Intrinsic Value (in thousands)		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (years)
Balance at August 31, 2012		4,883,919			8,677,941		$	4,719	$	25.88		2.90
Shares authorized		9,500,000
Options canceled		374,298			(374,298	)			$	25.52
Restricted stock awards granted, net of forfeitures⁽¹⁾		(3,315,157	)		—
Options exercised		—			(259,112	)			$	13.25

Balance at May 31, 2013		11,443,060			8,044,531		$	403	$	26.30		2.22

Exercisable at May 31, 2013					8,039,830		$	387	$	26.30		2.22

⁽¹⁾	Represents the maximum number of shares that can be issued based on the achievement of certain performance criteria.

Summary of Restricted Stock Activity

The following table summarizes restricted stock activity from August 31, 2012 through May 31, 2013:


	Shares			Weighted - Average Grant-Date Fair Value
Non-vested balance at August 31, 2012		12,945,864		$	16.33
Changes during the period
Shares granted⁽¹⁾		3,673,494		$	17.65
Shares vested		(4,436,193	)	$	15.12
Shares forfeited		(358,337	)	$	17.71

Non-vested balance at May 31, 2013		11,824,828		$	17.15

⁽¹⁾	For those shares granted that are based on the achievement of certain performance criteria, represents the maximum number of shares that can vest.