Option Activity and Information about Options Outstanding (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Sep. 27, 2014
Number of options
Outstanding at beginning of period	8,377,928
Granted	724,746
Exercised	(1,142,083)
Canceled/forfeited	(126,703)
Outstanding at end of period	7,833,888
Vested or expected to vest at end of period	7,677,210
Vested and exercisable at end of period	3,388,805
Weighted Average Exercise Price
Outstanding at beginning of period	$ 13.69
Granted	$ 92.73
Exercised	$ 7.13
Canceled/forfeited	$ 29.20
Outstanding at end of period	$ 21.70
Vested or expected to vest at end of period	$ 21.70
Vested and exercisable at end of period	$ 10.26
Weighted Average Remaining Contractual Life (years)
Outstanding at end of period	5 years 10 months 2 days
Vested or expected to vest at end of period	5 years 10 months 2 days
Vested and exercisable at end of period	5 years 6 months 22 days
Aggregate Intrinsic Value
Outstanding at September 27, 2014	$ 405,430
Vested and exercisable at September 27, 2014	$ 207,492