Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Revenue:
Total revenue	$ 2,336,319	$ 2,138,022	$ 1,943,032
Costs and expenses:
Marketing and sales	481,673	439,669	419,161
Research and development	935,938	884,816	804,223
General and administrative	139,806	133,406	134,181
Amortization of acquired intangibles	12,128	14,086	14,716
Restructuring and other charges	8,621	11,089	9,406
Total costs and expenses	1,844,523	1,741,813	1,619,077
Income from operations	491,796	396,209	323,955
Interest expense	(18,829)	(23,139)	(25,664)
Other income, net	6,001	3,320	16,755
Income before provision (benefit) for income taxes	478,968	376,390	315,046
Provision (benefit) for income taxes	(510,011)	30,613	110,945
Net income	$ 988,979	$ 345,777	$ 204,101
Net income per share - basic (in usd per share)	$ 3.62	$ 1.26	$ 0.75
Net income per share - diluted (in usd per share)	$ 3.53	$ 1.23	$ 0.73
Weighted average common shares outstanding - basic (shares)	273,239	273,729	272,097
Weighted average common shares outstanding - diluted (shares)	280,515	281,144	280,221
Product and maintenance
Revenue:
Total revenue	$ 2,204,615	$ 1,997,887	$ 1,813,987
Costs and expenses:
Cost of sales	189,146	173,011	156,676
Services
Revenue:
Total revenue	131,704	140,135	129,045
Costs and expenses:
Cost of sales	$ 77,211	$ 85,736	$ 80,714