Income Taxes (Effective Income Tax Rate) (Details)	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
U.S. federal statutory income tax rate	21.00%	21.00%	35.00%
State and local taxes, net of federal benefit	2.10%	1.90%	1.80%
Research and development tax credits	(2.10%)	(2.30%)	(3.20%)
Investment tax credits	(1.10%)	(1.20%)	(1.50%)
Qualified production activity deduction	0.00%	0.00%	(1.30%)
Foreign rate differential	0.70%	1.10%	(4.20%)
Net reversals for unrecognized tax benefits	(0.60%)	(0.30%)	(0.80%)
Stock-based compensation	(3.30%)	(3.30%)	(3.10%)
U.S. export sales	(2.40%)	(1.30%)	0.00%
Provisional charges related to U.S. tax reform	0	(0.002)	0.016
Other	0.80%	(0.10%)	(3.50%)
Effective income tax rate	15.10%	15.30%	20.80%