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

9 Months Ended

Aug. 30, 2013

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 August 30, 2013 (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Current assets:
Cash	$	173,240	$	—	$	—		$	173,240
Cash equivalents:
Corporate bonds and commercial paper	2,500		—		—			2,500
Money market mutual funds	506,638		—		—			506,638
Time deposits	117,707		—		—			117,707
U.S. agency securities	14,999		1		—			15,000
U.S. Treasury securities	4,000		—		—			4,000
Total cash equivalents	645,844		1		—			645,845
Total cash and cash equivalents	819,084		1		—			819,085
Short-term fixed income securities:
Corporate bonds and commercial paper	1,283,045		4,685		(4,333		)	1,283,397
Foreign government securities	11,238		27		(27		)	11,238
Municipal securities	188,902		72		(329		)	188,645
U.S. agency securities	468,517		1,015		(939		)	468,593
U.S. Treasury securities	393,001		149		(981		)	392,169
Subtotal	2,344,703		5,948		(6,609		)	2,344,042
Marketable equity securities	184		626		—			810
Total short-term investments	2,344,887		6,574		(6,609		)	2,344,852
Total cash, cash equivalents and short-term investments	$	3,163,971	$	6,575	$	(6,609	)	$	3,163,937

Cash, cash equivalents and short-term investments consisted of the following as of November 30, 2012 (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Current assets:
Cash	$	200,771	$	—	$	—		$	200,771
Cash equivalents:
Corporate bonds and commercial paper	3,998		—		—			3,998
Money market mutual funds and repurchase agreements	1,171,270		—		—			1,171,270
Municipal securities	3,895		—		—			3,895
Time deposits	45,118		—		—			45,118
Total cash equivalents	1,224,281		—		—			1,224,281
Total cash and cash equivalents	1,425,052		—		—			1,425,052
Short-term fixed income securities:
Corporate bonds and commercial paper	1,059,158		11,415		(133		)	1,070,440
Foreign government securities	6,919		45		(12		)	6,952
Municipal securities	180,488		97		(60		)	180,525
Time deposits	20,113		—		—			20,113
U.S. agency securities	501,863		2,346		(18		)	504,191
U.S. Treasury securities	330,072		801		(37		)	330,836
Subtotal	2,098,613		14,704		(260		)	2,113,057
Marketable equity securities	237		7		—			244
Total short-term investments	2,098,850		14,711		(260		)	2,113,301
Total cash, cash equivalents and short-term investments	$	3,523,902	$	14,711	$	(260	)	$	3,538,353

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 August 30, 2013 and November 30, 2012 (in thousands):

	2013					2012
	Fair  Value		Gross Unrealized Losses			Fair  Value		Gross Unrealized Losses
Corporate bonds and commercial paper	$	667,920	$	(4,334	)	$	95,489	$	(132	)
Foreign government securities	6,444		(27		)	2,105		(12		)
Municipal securities	74,804		(329		)	40,524		(60		)
U.S. Treasury and agency securities	431,040		(1,919		)	48,203		(55		)
Total	$	1,180,208	$	(6,609	)	$	186,321	$	(259	)

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 November 30, 2012 (in thousands):

	2012
	Fair  Value		Gross Unrealized Losses
Corporate bonds and commercial paper	$	2,999	$	(1	)
Total	$	2,999	$	(1	)

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 August 30, 2013 (in thousands):

	Amortized Cost		Estimated Fair Value
Due within one year	$	572,921	$	573,977
Due between one and two years	812,070		814,355
Due between two and three years	681,816		680,980
Due after three years	277,896		274,730
Total	$	2,344,703	$	2,344,042