Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Jun. 30, 2013
Financial Instruments [Line Items]
Fair value	$ 1,462,171	$ 1,334,746
Derivative Assets	2,487	4,929
Total Assets	2,674,450	2,255,183
Derivative Liabilities	1,340	1,815
Money Market Funds
Financial Instruments [Line Items]
Fair value	1,042,596	725,311
Municipal Notes And Bonds
Financial Instruments [Line Items]
Fair value	248,949	268,746
US Treasury and Agencies
Financial Instruments [Line Items]
Fair value	182,967	155,293
Government-Sponsored Enterprises
Financial Instruments [Line Items]
Fair value	41,089	54,805
Foreign Government Debt Securities
Financial Instruments [Line Items]
Fair value	34,988	24,972
Corporate Notes And Bonds
Financial Instruments [Line Items]
Fair value	961,378	860,492
Mortgage Backed Securities - Residential
Financial Instruments [Line Items]
Fair value	26,580	27,365
Mortgage Backed Securities - Commercial
Financial Instruments [Line Items]
Fair value	104,857	107,958
Publicly Traded Equity Securities
Financial Instruments [Line Items]
Fair value		7,096
Total Short Term Investments
Financial Instruments [Line Items]
Fair value	2,643,404	2,224,942
Mutual Funds
Financial Instruments [Line Items]
Fair value	28,559	18,216
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Instruments [Line Items]
Fair value	176,879	155,293
Total Assets	1,386,671	1,070,801
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money Market Funds
Financial Instruments [Line Items]
Fair value	1,042,596	725,311
Quoted Prices in Active Markets for Identical Assets (Level 1) | US Treasury and Agencies
Financial Instruments [Line Items]
Fair value	182,967	155,293
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate Notes And Bonds
Financial Instruments [Line Items]
Fair value	132,549	164,885
Quoted Prices in Active Markets for Identical Assets (Level 1) | Publicly Traded Equity Securities
Financial Instruments [Line Items]
Fair value		7,096
Quoted Prices in Active Markets for Identical Assets (Level 1) | Total Short Term Investments
Financial Instruments [Line Items]
Fair value	1,358,112	1,045,489
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual Funds
Financial Instruments [Line Items]
Fair value	28,559	18,216
Significant Other Observable Inputs (Level 2)
Financial Instruments [Line Items]
Fair value	1,285,292	1,179,453
Derivative Assets	2,487	4,929
Total Assets	1,287,779	1,184,382
Derivative Liabilities	1,190	1,620
Significant Other Observable Inputs (Level 2) | Municipal Notes And Bonds
Financial Instruments [Line Items]
Fair value	248,949	268,746
Significant Other Observable Inputs (Level 2) | Government-Sponsored Enterprises
Financial Instruments [Line Items]
Fair value	41,089	54,805
Significant Other Observable Inputs (Level 2) | Foreign Government Debt Securities
Financial Instruments [Line Items]
Fair value	34,988	24,972
Significant Other Observable Inputs (Level 2) | Corporate Notes And Bonds
Financial Instruments [Line Items]
Fair value	828,829	695,607
Significant Other Observable Inputs (Level 2) | Mortgage Backed Securities - Residential
Financial Instruments [Line Items]
Fair value	26,580	27,365
Significant Other Observable Inputs (Level 2) | Mortgage Backed Securities - Commercial
Financial Instruments [Line Items]
Fair value	104,857	107,958
Significant Other Observable Inputs (Level 2) | Total Short Term Investments
Financial Instruments [Line Items]
Fair value	1,285,292	1,179,453
Significant Unobservable Inputs (Level 3)
Financial Instruments [Line Items]
Derivative Liabilities	$ 150	$ 195