Contractual Maturities of Investments Held (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 29, 2014
Schedule of Available-for-sale Securities
Due within one year, cost	$ 488,257
Due after 1 year through 5 years, cost	317,047
Due after 5 years through 10 years, cost	6,289
Due after 10 years, cost	24,326
Total, cost	835,919
Due within one year, fair value	488,439
Due after 1 year through 5 years, fair value	317,321
Due after 5 years through 10 years, fair value	6,467
Due after 10 years, fair value	25,848
Total, fair value	$ 838,075