Income Taxes (Details 3) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Deferred Tax Assets:
Tax credit carryforwards	$ 206,008	$ 197,524
Reserves and accruals	47,562	43,522
Intangible assets	583,323	12,096
Capitalized research and development expense for income tax purposes	18,477	6,975
Operating loss carryforwards	6,201	15,347
Deferred income	16,704	6,580
Capital loss carryforwards	17,320	20,342
Stock-based compensation costs	15,097	15,329
Depreciation and amortization	8,721	8,759
Investments	2,459	2,900
Lease liability	25,016	0
Total deferred tax assets	946,888	329,374
Valuation allowance	(125,520)	(108,724)
Net deferred tax assets	821,368	220,650
Deferred Tax Liabilities:
Intangible assets	(24,907)	(36,194)
Undistributed foreign earnings	(31,916)	(27,627)
ROU assets	(25,016)	0
Other	(8,350)	(2,497)
Total deferred tax liabilities	(90,189)	(66,318)
Total net deferred tax assets	$ 731,179	$ 154,332