Stock-Based Compensation Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 01, 2016	Sep. 26, 2015	Oct. 01, 2016	Sep. 26, 2015
Stock Based compensation expense
Stock-based compensation effect on income before taxes	$ 29,802	$ 26,681	$ 59,206	$ 53,001
Cost of Sales [Member]
Stock Based compensation expense
Stock-based compensation effect on income before taxes	1,930	1,763	4,049	3,727
Research and Development [Member]
Stock Based compensation expense
Stock-based compensation effect on income before taxes	16,529	12,934	31,649	27,626
Selling, General and Administrative Expenses [Member]
Stock Based compensation expense
Stock-based compensation effect on income before taxes	$ 11,343	$ 11,984	$ 23,508	$ 21,648