Options Activity and Information about Options Outstanding (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Sep. 28, 2013
Number of options
Outstanding at beginning of period	10,381,342
Granted	613,381
Exercised	(2,144,008)
Canceled/forfeited	(3,510)
Outstanding at end of period	8,847,205
Vested or expected to vest at end of period	8,493,317
Vested and exercisable at end of period	2,203,549
Weighted Average Exercise Price
Outstanding at beginning of period	$ 9.21
Granted	$ 62.46
Exercised	$ 6.08
Canceled/forfeited	$ 62.24
Outstanding at end of period	$ 13.64
Vested or expected to vest at end of period	$ 13.64
Vested and exercisable at end of period	$ 7.12
Weighted Average Remaining Contractual Live (years)
Outstanding at end of period	6 years 7 months 21 days
Vested or expected to vest at end of period	6 years 7 months 21 days
Vested and exercisable at end of period	6 years 2 months 16 days
Aggregate Intrinsic Value
Outstanding at September 28, 2013	$ 538,013
Vested and exercisable at September 28, 2013	$ 148,362