Stock Benefit Plans And Stock-Based Compensation (Tables)

12 Months Ended

Nov. 30, 2011

Stock Benefit Plans And Stock-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, 2010		22,173		$	8.36
Granted		2,211			27.12
Exercised		(8,018	)		9.55
Forfeited or expired		(402	)		16.25
Outstanding at November 30, 2011		15,964		$	10.16		3.21	$	277,938
Vested and expected to vest at November 30, 2011		15,431		$	9.75		3.11	$	274,693
Exercisable at November 30, 2011		12,573		$	7.68		2.55	$	248,256

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, 2010		4,314			1,659			4,092			10,065		$	9.47
Granted		1,184			360			274			1,818			26.51
Vested		(1,687	)		(495	)		—			(2,182	)		8.68
Forfeited		(368	)		(101	)		(20	)		(489	)		13.51
Nonvested at November 30, 2011		3,443			1,423			4,346			9,212			12.71

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

	Year Ended November 30,
	2011			2010			2009
Stock Option grants:
Expected term of stock options (years)		4.8 – 5.1			4.8 – 5.1			4.7 – 5.1
Risk-free interest rate		0.9 – 2.1	%		1.3 – 2.4	%		1.7 – 2.6	%
Volatility		42 – 47	%		42 – 44	%		48 –56	%
Weighted-average grant-date fair value (per share)	$	10.70		$	4.99		$	3.42
Employee stock purchase plans:
Expected term of ESPP (years)		0.5			0.5			0.5
Risk-free interest rate		0.2	%		0.2	%		0.3 – 0.4	%
Volatility		38 – 39	%		35 – 39	%		51 – 71	%
Weighted-average grant-date fair value (per share)	$	6.56		$	2.87		$	2.12