Cash, Cash Equivalents, and Investments - Gross Unrealized Losses and Fair Values for Available-for-Sale Investments (Detail) $ in Thousands	Jul. 02, 2017 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	$ 285,915
Unrealized losses, less than 12 months	(618)
Fair value, 12 months or greater	11,898
Unrealized losses, 12 months or greater	(22)
Total fair value	297,813
Total unrealized losses	(640)
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	143,666
Unrealized losses, less than 12 months	(306)
Fair value, 12 months or greater	8,897
Unrealized losses, 12 months or greater	(20)
Total fair value	152,563
Total unrealized losses	(326)
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	62,295
Unrealized losses, less than 12 months	(190)
Fair value, 12 months or greater	0
Unrealized losses, 12 months or greater	0
Total fair value	62,295
Total unrealized losses	(190)
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	52,141
Unrealized losses, less than 12 months	(37)
Fair value, 12 months or greater	0
Unrealized losses, 12 months or greater	0
Total fair value	52,141
Total unrealized losses	(37)
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	24,737
Unrealized losses, less than 12 months	(84)
Fair value, 12 months or greater	3,001
Unrealized losses, 12 months or greater	(2)
Total fair value	27,738
Total unrealized losses	(86)
Agency Bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	3,076
Unrealized losses, less than 12 months	(1)
Fair value, 12 months or greater	0
Unrealized losses, 12 months or greater	0
Total fair value	3,076
Total unrealized losses	$ (1)