Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2013	Jun. 30, 2013
Financial Instruments [Line Items]
Fair value	$ 1,295,031	$ 1,334,746
Derivative Assets	4,184	4,929
Total Assets	2,410,306	2,255,183
Derivative Liabilities	542	1,815
Money Market Funds
Financial Instruments [Line Items]
Fair value	926,971	725,311
Municipal Notes And Bonds
Financial Instruments [Line Items]
Fair value	247,864	268,746
US Treasury and Agencies
Financial Instruments [Line Items]
Fair value	154,401	155,293
Government-Sponsored Enterprises
Financial Instruments [Line Items]
Fair value	54,713	54,805
Foreign Government Debt Securities
Financial Instruments [Line Items]
Fair value	23,699	24,972
Corporate Notes And Bonds
Financial Instruments [Line Items]
Fair value	845,095	860,492
Mortgage Backed Securities - Residential
Financial Instruments [Line Items]
Fair value	25,218	27,365
Mortgage Backed Securities - Commercial
Financial Instruments [Line Items]
Fair value	103,092	107,958
Publicly Traded Equity Securities
Financial Instruments [Line Items]
Fair value	5,834	7,096
Total Short Term Investments
Financial Instruments [Line Items]
Fair value	2,386,887	2,224,942
Mutual Funds
Financial Instruments [Line Items]
Fair value	19,235	18,216
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Instruments [Line Items]
Fair value	160,235	155,293
Total Assets	1,271,326	1,070,801
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money Market Funds
Financial Instruments [Line Items]
Fair value	926,971	725,311
Quoted Prices in Active Markets for Identical Assets (Level 1) | US Treasury and Agencies
Financial Instruments [Line Items]
Fair value	154,401	155,293
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate Notes And Bonds
Financial Instruments [Line Items]
Fair value	164,885	164,885
Quoted Prices in Active Markets for Identical Assets (Level 1) | Publicly Traded Equity Securities
Financial Instruments [Line Items]
Fair value	5,834	7,096
Quoted Prices in Active Markets for Identical Assets (Level 1) | Total Short Term Investments
Financial Instruments [Line Items]
Fair value	1,252,091	1,045,489
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual Funds
Financial Instruments [Line Items]
Fair value	19,235	18,216
Significant Other Observable Inputs (Level 2)
Financial Instruments [Line Items]
Fair value	1,134,796	1,179,453
Derivative Assets	4,184	4,929
Total Assets	1,138,980	1,184,382
Derivative Liabilities	367	1,620
Significant Other Observable Inputs (Level 2) | Municipal Notes And Bonds
Financial Instruments [Line Items]
Fair value	247,864	268,746
Significant Other Observable Inputs (Level 2) | Government-Sponsored Enterprises
Financial Instruments [Line Items]
Fair value	54,713	54,805
Significant Other Observable Inputs (Level 2) | Foreign Government Debt Securities
Financial Instruments [Line Items]
Fair value	23,699	24,972
Significant Other Observable Inputs (Level 2) | Corporate Notes And Bonds
Financial Instruments [Line Items]
Fair value	680,210	695,607
Significant Other Observable Inputs (Level 2) | Mortgage Backed Securities - Residential
Financial Instruments [Line Items]
Fair value	25,218	27,365
Significant Other Observable Inputs (Level 2) | Mortgage Backed Securities - Commercial
Financial Instruments [Line Items]
Fair value	103,092	107,958
Significant Other Observable Inputs (Level 2) | Total Short Term Investments
Financial Instruments [Line Items]
Fair value	1,134,796	1,179,453
Significant Unobservable Inputs (Level 3)
Financial Instruments [Line Items]
Derivative Liabilities	$ 175	$ 195