Fair Value Measurement - Assets and Liabilities at Fair Value (Details) - USD ($)	12 Months Ended
	Apr. 03, 2016	Mar. 29, 2015	Mar. 30, 2014
Cash equivalents and short-term investments:
Fair value of convertible notes	$ 351,500,000
Fair value of deferred compensation plan assets	14,600,000	$ 16,500,000
Payment	0	1,600,000	$ 5,130,000
Fox Enterprises
Cash equivalents and short-term investments:
Payment			3,300,000
Alvand Technologies
Cash equivalents and short-term investments:
Payment			$ 1,800,000
Fair Value, Measurements, Recurring
Cash equivalents and short-term investments:
U.S. government treasuries and agencies securities	32,519,000	135,945,000
Money market funds	124,504,000	55,578,000
Asset-backed securities	10,515,000	31,830,000
Corporate bonds	91,388,000	245,675,000
International government bonds	2,208,000	1,006,000
Corporate commercial paper	1,992,000	4,999,000
Bank deposits	11,711,000	16,915,000
Repurchase agreements	114,000	191,000
Municipal bonds	900,000	6,044,000
Total assets measured at fair value	275,851,000	498,183,000
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Cash equivalents and short-term investments:
U.S. government treasuries and agencies securities	32,519,000	135,945,000
Money market funds	124,504,000	55,578,000
Asset-backed securities	0	0
Corporate bonds	0	0
International government bonds	0	0
Corporate commercial paper	0	0
Bank deposits	0	0
Repurchase agreements	0	0
Municipal bonds	0	0
Total assets measured at fair value	157,023,000	191,523,000
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Cash equivalents and short-term investments:
U.S. government treasuries and agencies securities	0	0
Money market funds	0	0
Asset-backed securities	10,515,000	31,830,000
Corporate bonds	91,388,000	245,675,000
International government bonds	2,208,000	1,006,000
Corporate commercial paper	1,992,000	4,999,000
Bank deposits	11,711,000	16,915,000
Repurchase agreements	114,000	191,000
Municipal bonds	900,000	6,044,000
Total assets measured at fair value	118,828,000	306,660,000
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Cash equivalents and short-term investments:
U.S. government treasuries and agencies securities	0	0
Money market funds	0	0
Asset-backed securities	0	0
Corporate bonds	0	0
International government bonds	0	0
Corporate commercial paper	0	0
Bank deposits	0	0
Repurchase agreements	0	0
Municipal bonds	0	0
Total assets measured at fair value	$ 0	0
Payment		540,000
Fair Value, Measurements, Recurring | Alvand Technologies | Significant Unobservable Inputs (Level 3)
Cash equivalents and short-term investments:
Payment of contingent consideration		1,600,000
Estimate of Fair Value Measurement
Cash equivalents and short-term investments:
Contingent consideration fair value disclosure		$ 0