Stock Benefit Plans and Stock-Based Compensation (Tables)

12 Months Ended

Nov. 30, 2012

Share-based Compensation [Abstract]

Summary Of Stock Option Activity

Stock Options	Number of Shares Underlying Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (year)	Aggregate Intrinsic Value
Outstanding at November 30, 2011	15,964		$	10.16
Granted	193		24.21
Exercised	(3,560	)	9.00
Forfeited or expired	(398	)	18.63
Outstanding at November 30, 2012	12,199		$	10.45	2.51	$	180,399
Vested and expected to vest at November 30, 2012	11,973		$	10.48	2.46	$	179,799
Exercisable at November 30, 2012	10,488		$	7.78	2.08	$	172,886

Summary Of Nonvested Stock Awards

Nonvested Stock Awards	Restricted Stock		Restricted Stock Units		Performance-based Restricted Stock Units		Total Number of Shares Underlying Stock Awards		Weighted-Average Grant Date Fair Value
Nonvested at November 30, 2011	3,443		1,423		4,346		9,212		$	12.71
Granted	1,387		692		685		2,764		25.77
Vested	(1,431	)	(491	)	(106	)	(2,028	)	13.06
Forfeited	(272	)	(101	)	(155	)	(528	)	11.81
Nonvested at November 30, 2012	3,127		1,523		4,770		9,420		16.51

Summary Of Assumptions For Estimating Fair Value Of Stock-Based Awards

	Year Ended November 30,
	2012			2011			2010
Stock Option grants:
Expected term of stock options (years)	4.8			4.8 – 5.1			4.8 – 5.1
Risk-free interest rate	0.7 - 1.5%			0.9 - 2.1%			1.3 – 2.4%
Volatility	42 – 47%			42 – 47%			42 – 44%
Weighted-average grant-date fair value (per share)	$	9.91		$	10.70		$	4.99
Employee stock purchase plans:
Expected term of ESPP (years)	0.5			0.5			0.5
Risk-free interest rate	0.1		%	0.2		%	0.2		%
Volatility	43 – 52%			38 – 39%			35 – 39%
Weighted-average grant-date fair value (per share)	$	7.62		$	6.56		$	2.87