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

6 Months Ended

May. 29, 2015

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 May 29, 2015 (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Current assets:
Cash	$	189,336	$	—	$	—		$	189,336
Cash equivalents:
Corporate bonds and commercial paper	1,005		—		—			1,005
Money market mutual funds	697,055		—		—			697,055
Municipal securities	5,100		1		—			5,101
Time deposits	63,650		—		—			63,650
Total cash equivalents	766,810		1		—			766,811
Total cash and cash equivalents	956,146		1		—			956,147
Short-term fixed income securities:
Corporate bonds and commercial paper	1,535,460		5,673		(844		)	1,540,289
Asset-backed securities	55,697		100		(5		)	55,792
Municipal securities	154,726		207		(74		)	154,859
U.S. agency securities	323,320		602		(14		)	323,908
U.S. Treasury securities	381,754		514		(15		)	382,253
Total short-term investments	2,450,957		7,096		(952		)	2,457,101
Total cash, cash equivalents and short-term investments	$	3,407,103	$	7,097	$	(952	)	$	3,413,248

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

	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Current assets:
Cash	$	348,283	$	—	$	—		$	348,283
Cash equivalents:
Money market mutual funds	705,978		—		—			705,978
Time deposits	63,139		—		—			63,139
Total cash equivalents	769,117		—		—			769,117
Total cash and cash equivalents	1,117,400		—		—			1,117,400
Short-term fixed income securities:
Corporate bonds and commercial paper	1,514,632		5,253		(509		)	1,519,376
Foreign government securities	4,499		12		—			4,511
Municipal securities	174,775		438		(12		)	175,201
U.S. agency securities	497,154		1,295		(64		)	498,385
U.S. Treasury securities	423,075		1,080		(28		)	424,127
Subtotal	2,614,135		8,078		(613		)	2,621,600
Marketable equity securities	153		338		—			491
Total short-term investments	2,614,288		8,416		(613		)	2,622,091
Total cash, cash equivalents and short-term investments	$	3,731,688	$	8,416	$	(613	)	$	3,739,491

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 May 29, 2015 and November 28, 2014 (in thousands):

	2015					2014
	Fair  Value		Gross Unrealized Losses			Fair  Value		Gross Unrealized Losses
Corporate bonds and commercial paper	$	335,218	$	(821	)	$	291,890	$	(443	)
Municipal securities	43,184		(74		)	21,759		(12		)
U.S. Treasury and agency securities	88,491		(27		)	43,507		(64		)
Asset-backed securities	5,272		(5		)	—		—
Total	$	472,165	$	(927	)	$	357,156	$	(519	)

Continuous Unrealized Loss Position Twelve Months or Longer 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 were in a continuous unrealized loss position for more than twelve months, as of May 29, 2015 and November 28, 2014 (in thousands):

	2015					2014
	Fair  Value		Gross Unrealized Losses			Fair  Value		Gross Unrealized Losses
Corporate bonds and commercial paper	$	3,425	$	(23	)	$	8,636	$	(66	)
U.S. Treasury and agency securities	651		(2		)	5,884		(28		)
Total	$	4,076	$	(25	)	$	14,520	$	(94	)

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 May 29, 2015 (in thousands):

	Amortized Cost		Estimated Fair Value
Due within one year	$	608,233	$	609,026
Due between one and two years	953,819		956,347
Due between two and three years	660,113		661,961
Due after three years	228,792		229,767
Total	$	2,450,957	$	2,457,101