Cash, Cash Equivalents and Short-Term Investments (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 29, 2013 securities	Nov. 30, 2012 securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 3,164,332	$ 3,523,902
Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities [Abstract]
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, fair value	344,559	186,321
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, gross unrealized losses	(938)	(259)
Available-for-sale securities in a continuous unrealized loss position for more than twelve months, fair value		2,999
Available-for-sale securities in a continuous unrealized loss position for more than twelve months, gross unrealized losses		(1)
Available-for-sale Securities, Gross Unrealized Gain	10,358	14,711
Available-for-sale Securities, Gross Unrealized Loss	(938)	(260)
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]
Number of securities in a continuous unrealized loss position for less than twelve months	177	65
Number of securities in a continuous unrealized loss position for more than twelve months		1
Corporate bonds and commercial paper [Member]
Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities [Abstract]
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, fair value	225,759	95,489
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, gross unrealized losses	(631)	(132)
Available-for-sale securities in a continuous unrealized loss position for more than twelve months, fair value		2,999
Available-for-sale securities in a continuous unrealized loss position for more than twelve months, gross unrealized losses		(1)
Foreign government securities [Member]
Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities [Abstract]
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, fair value	0	2,105
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, gross unrealized losses	0	(12)
Municipal securities [Member]
Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities [Abstract]
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, fair value	13,522	40,524
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, gross unrealized losses	(24)	(60)
U.S. Treasury and agency securities [Member]
Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities [Abstract]
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, fair value	105,278	48,203
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, gross unrealized losses	(283)	(55)
Cash Equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	548,335	1,224,281
Available-for-sale Securities, Amortized Cost Basis	548,335	1,224,281
Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities [Abstract]
Available-for-sale Securities, Gross Unrealized Gain	0	0
Available-for-sale Securities, Gross Unrealized Loss	0	0
Cash Equivalents [Member] | Corporate bonds and commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure		3,998
Available-for-sale Securities, Amortized Cost Basis		3,998
Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities [Abstract]
Available-for-sale Securities, Gross Unrealized Gain		0
Available-for-sale Securities, Gross Unrealized Loss		0
Cash Equivalents [Member] | Money market mutual funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	429,373	1,171,270
Available-for-sale Securities, Amortized Cost Basis	429,373	1,171,270
Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities [Abstract]
Available-for-sale Securities, Gross Unrealized Gain	0	0
Available-for-sale Securities, Gross Unrealized Loss	0	0
Cash Equivalents [Member] | Time Deposits [Member]
Schedule of Available-for-sale Securities [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	104,711	45,118
Available-for-sale Securities, Amortized Cost Basis	104,711	45,118
Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities [Abstract]
Available-for-sale Securities, Gross Unrealized Gain	0	0
Available-for-sale Securities, Gross Unrealized Loss	0	0
Cash Equivalents [Member] | U.S. Treasury securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	14,251
Available-for-sale Securities, Amortized Cost Basis	14,251
Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities [Abstract]
Available-for-sale Securities, Gross Unrealized Gain	0
Available-for-sale Securities, Gross Unrealized Loss	0
Cash Equivalents [Member] | Municipal securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure		3,895
Available-for-sale Securities, Amortized Cost Basis		3,895
Fair Value and Gross Unrealized Losses Related to Available-For-Sale Securities [Abstract]
Available-for-sale Securities, Gross Unrealized Gain		0
Available-for-sale Securities, Gross Unrealized Loss		$ 0