Segment Geographic and Significant Customer Information - Significant Customers (Detail) (Net Revenue)	3 Months Ended			9 Months Ended
	Jan. 24, 2014	Jan. 25, 2013		Jan. 24, 2014	Jan. 25, 2013
Arrow Electronics, Inc.
Segment Reporting Information [Line Items]
Percentage of net revenues	20.00%	18.00%		21.00%	19.00%	[1]
Avnet, Inc.
Segment Reporting Information [Line Items]
Percentage of net revenues	15.00%	15.00%	[1]	16.00%	15.00%	[1]

[1] Net revenues for Arrow Electronics, Inc. for the nine months ended January 25, 2013 have been corrected from 18% previously disclosed to 19%. Net revenues for Avnet, Inc. for each of the three and nine months ended January 25, 2013 have been corrected from 14% previously disclosed to 15%.