Cash, Cash Equivalents, and Investments - Effective Maturity Dates of Available-for-Sale Investments (Detail) $ in Thousands	Jul. 01, 2018 USD ($)
Schedule of Available-for-sale Securities [Line Items]
1 year or less	$ 353,740
1-2 years	132,990
2-3 years	77,918
3-4 years	33,811
4-5 years	19,447
5-7 years	7,775
Fair value	625,681
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	116,347
1-2 years	96,004
2-3 years	71,890
3-4 years	29,491
4-5 years	7,704
5-7 years	3,365
Fair value	324,801
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
1 year or less	136,377
1-2 years	0
2-3 years	0
3-4 years	0
4-5 years	0
5-7 years	0
Fair value	136,377
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
1 year or less	55,240
1-2 years	31,023
2-3 years	2,178
3-4 years	4,320
4-5 years	5,809
5-7 years	4,410
Fair value	102,980
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	7,375
1-2 years	5,963
2-3 years	3,008
3-4 years	0
4-5 years	0
5-7 years	0
Fair value	16,346
Agency Bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	29,247
1-2 years	0
2-3 years	0
3-4 years	0
4-5 years	5,934
5-7 years	0
Fair value	35,181
Municipal Bonds
Schedule of Available-for-sale Securities [Line Items]
1 year or less	9,154
1-2 years	0
2-3 years	842
3-4 years	0
4-5 years	0
5-7 years	0
Fair value	$ 9,996