Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 01, 2017	Dec. 02, 2016
Deferred tax assets:
Acquired technology	$ 4,846	$ 7,421
Reserves and accruals	48,761	35,440
Deferred revenue	23,452	21,039
Unrealized losses on investments	11	2,391
Stock-based compensation	74,942	56,353
Net operating loss carryforwards of acquired companies	44,465	31,305
Credit carryforwards	124,205	63,315
Capitalized expenses	13,428	15,571
Benefits relating to tax positions	33,318	39,492
Other	30,289	26,439
Total gross deferred tax assets	397,717	298,766
Deferred tax assets valuation allowance	(93,568)	(24,265)
Total deferred tax assets	304,149	274,501
Deferred tax liabilities:
Depreciation and amortization	84,064	78,619
Undistributed earnings of foreign subsidiaries	382,744	292,844
Acquired intangible assets	117,282	120,698
Total deferred tax liabilities	584,090	492,161
Net deferred tax liabilities	279,941	217,660
Aggregate changes in total gross amount of unrecognized tax benefits [Abstract]
Beginning balance	178,413	258,718
Gross increases in unrecognized tax benefits - prior year tax positions	3,680	6,047
Gross decreases in unrecognized tax benefits - prior year tax positions	(30,166)	(67,870)
Gross increases in unrecognized tax benefits - current year tax positions	24,927	23,068
Settlements with taxing authorities	(3,876)	(33,265)
Lapse of statute of limitations	(8,819)	(8,456)
Foreign exchange gains and losses	8,786	171
Ending balance	$ 172,945	$ 178,413