Cash, Cash Equivalents and Short-Term Investments (Details 1) $ in Thousands	Nov. 29, 2019 USD ($) securities	Nov. 30, 2018 USD ($) securities
Schedule of Available-for-sale Securities
Debt Securities, Available-for-sale, Amortized Cost	$ 4,172,770	$ 3,254,290
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	245,111	551,404
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(188)	(8,101)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	51,054	1,020,199
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ (74)	$ (17,272)
Fair Value and Gross Unrealized Losses
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year | securities	115	369
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | securities	38	577
Corporate debt securities [Member]
Schedule of Available-for-sale Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 235,155	$ 538,109
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(183)	(7,966)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	44,300	969,701
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(70)	(16,730)
Asset-backed Securities [Member]
Schedule of Available-for-sale Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	6,651	6,696
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(5)	(54)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	6,754	34,812
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(4)	(313)
Municipal securities [Member]
Schedule of Available-for-sale Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	3,305	6,599
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	(81)
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0	11,532
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	(205)
Foreign government securities [Member]
Schedule of Available-for-sale Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	0	4,154
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0	$ (24)