Cash, Cash Equivalents and Short-Term Investments (Tables)

3 Months Ended

Feb. 28, 2014

Cash, Cash Equivalents, and Short-term Investments [Abstract]

Cash Cash Equivalents and Short term Investments

Cash, cash equivalents and short-term investments consisted of the following as of February 28, 2014 (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Current assets:
Cash	$	289,712	$	—	$	—		$	289,712
Cash equivalents:
Money market mutual funds	388,448		—		—			388,448
Municipal securities	6,000		—		—			6,000
Time deposits	32,757		—		—			32,757
U.S. Treasury securities	16,997		2		—			16,999
Total cash equivalents	444,202		2		—			444,204
Total cash and cash equivalents	733,914		2		—			733,916
Short-term fixed income securities:
Corporate bonds and commercial paper	1,343,106		7,847		(382		)	1,350,571
Foreign government securities	11,188		59		—			11,247
Municipal securities	177,752		623		(4		)	178,371
U.S. agency securities	430,012		1,371		(169		)	431,214
U.S. Treasury securities	425,669		759		(111		)	426,317
Subtotal	2,387,727		10,659		(666		)	2,397,720
Marketable equity securities	178		278		—			456
Total short-term investments	2,387,905		10,937		(666		)	2,398,176
Total cash, cash equivalents and short-term investments	$	3,121,819	$	10,939	$	(666	)	$	3,132,092

Cash, cash equivalents and short-term investments consisted of the following as of November 29, 2013 (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Current assets:
Cash	$	286,221	$	—	$	—		$	286,221
Cash equivalents:
Money market mutual funds	429,373		—		—			429,373
Time deposits	104,711		—		—			104,711
U.S. Treasury securities	14,251		—		—			14,251
Total cash equivalents	548,335		—		—			548,335
Total cash and cash equivalents	834,556		—		—			834,556
Short-term fixed income securities:
Corporate bonds and commercial paper	1,261,375		7,116		(631		)	1,267,860
Foreign government securities	11,213		56		—			11,269
Municipal securities	186,320		328		(24		)	186,624
U.S. agency securities	446,615		1,516		(186		)	447,945
U.S. Treasury securities	424,076		799		(97		)	424,778
Subtotal	2,329,599		9,815		(938		)	2,338,476
Marketable equity securities	177		543		—			720
Total short-term investments	2,329,776		10,358		(938		)	2,339,196
Total cash, cash equivalents and short-term investments	$	3,164,332	$	10,358	$	(938	)	$	3,173,752

Continuous Unrealized Loss Position Less Than Twelve Months Related to Available-for-Sale Securities

The following table summarizes the fair value and gross unrealized losses related to available-for-sale securities, aggregated by investment category, that have been in an unrealized loss position for less than twelve months, as of February 28, 2014 and November 29, 2013 (in thousands):

	2014					2013
	Fair  Value		Gross Unrealized Losses			Fair  Value		Gross Unrealized Losses
Corporate bonds and commercial paper	$	194,460	$	(382	)	$	225,759	$	(631	)
Municipal securities	6,082		(4		)	13,522		(24		)
U.S. Treasury and agency securities	94,326		(280		)	105,278		(283		)
Total	$	294,868	$	(666	)	$	344,559	$	(938	)

Cost and Estimated Fair Value of Debt Securities

The following table summarizes the cost and estimated fair value of short-term fixed income securities classified as short-term investments based on stated effective maturities as of February 28, 2014 (in thousands):

	Amortized Cost		Estimated Fair Value
Due within one year	$	595,088	$	596,510
Due between one and two years	881,962		885,816
Due between two and three years	697,464		701,525
Due after three years	213,213		213,869
Total	$	2,387,727	$	2,397,720