Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Revenue:
Total revenue	$ 2,138,022	$ 1,943,032	$ 1,816,083
Costs and expenses:
Marketing and sales	439,669	419,161	395,194
Research and development	884,816	804,223	735,340
General and administrative	133,406	134,181	125,106
Amortization of acquired intangibles	14,086	14,716	18,095
Restructuring and other charges	11,089	9,406	40,955
Total costs and expenses	1,741,813	1,619,077	1,571,182
Income from operations	396,209	323,955	244,901
Interest expense	(23,139)	(25,664)	(23,670)
Other income, net	3,320	16,755	15,922
Income before provision for income taxes	376,390	315,046	237,153
Provision for income taxes	30,613	110,945	34,067
Net income	$ 345,777	$ 204,101	$ 203,086
Net income per share - basic (in usd per share)	$ 1.26	$ 0.75	$ 0.71
Net income per share - diluted (in usd per share)	$ 1.23	$ 0.73	$ 0.70
Weighted average common shares outstanding - basic (shares)	273,729	272,097	284,502
Weighted average common shares outstanding - diluted (shares)	281,144	280,221	291,256
Product and maintenance
Revenue:
Total revenue	$ 1,997,887	$ 1,813,987	$ 1,683,771
Costs and expenses:
Cost of sales	173,011	156,676	183,291
Services
Revenue:
Total revenue	140,135	129,045	132,312
Costs and expenses:
Cost of sales	$ 85,736	$ 80,714	$ 73,201