Cash, Cash Equivalents and Short-Term Investments (Details 1) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	May 30, 2014 securities	Nov. 29, 2013 securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities in a continuous unrealized loss position for more than twelve months, fair value	$ 50,278
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(281)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	19	0
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	147,549	344,559
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, gross unrealized losses	(126)	(938)
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	78	177
Corporate bonds and commercial paper
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities in a continuous unrealized loss position for more than twelve months, fair value	20,841
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(134)
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	93,651	225,759
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, gross unrealized losses	(95)	(631)
US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities in a continuous unrealized loss position for more than twelve months, fair value	29,437
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(147)
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	38,156	105,278
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, gross unrealized losses	(29)	(283)
Municipal securities
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	15,742	13,522
Available-for-sale securities in a continuous unrealized loss position for less than twelve months, gross unrealized losses	$ (2)	$ (24)