Stock-Based Compensation Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Stock Based compensation expense
Stock-based compensation effect on income before taxes	$ 28,740	$ 23,060	$ 50,846	$ 44,014
Cost of Revenues [Member]
Stock Based compensation expense
Stock-based compensation effect on income before taxes	2,077	1,858	4,069	3,662
Research and Development [Member]
Stock Based compensation expense
Stock-based compensation effect on income before taxes	14,831	11,343	25,336	21,562
Selling, General and Administrative Expenses [Member]
Stock Based compensation expense
Stock-based compensation effect on income before taxes	$ 11,832	$ 9,859	$ 21,441	$ 18,790