Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 29, 2013	Jun. 30, 2013
Financial Instruments [Line Items]
Fair value	$ 1,389,735	$ 1,334,746
Derivative Assets	5,618	4,929
Total Assets	2,312,756	2,255,183
Derivative Liabilities	293	1,815
Money Market Funds
Financial Instruments [Line Items]
Fair value	730,194	725,311
Municipal Notes And Bonds
Financial Instruments [Line Items]
Fair value	252,261	268,746
US Treasury and Agencies
Financial Instruments [Line Items]
Fair value	175,673	155,293
Government-Sponsored Enterprises
Financial Instruments [Line Items]
Fair value	38,399	54,805
Foreign Government Debt Securities
Financial Instruments [Line Items]
Fair value	29,708	24,972
Corporate Notes And Bonds
Financial Instruments [Line Items]
Fair value	928,123	860,492
Mortgage Backed Securities - Residential
Financial Instruments [Line Items]
Fair value	26,941	27,365
Mortgage Backed Securities - Commercial
Financial Instruments [Line Items]
Fair value	103,515	107,958
Publicly Traded Equity Securities
Financial Instruments [Line Items]
Fair value		7,096
Total Short Term Investments
Financial Instruments [Line Items]
Fair value	2,284,814	2,224,942
Mutual Funds
Financial Instruments [Line Items]
Fair value	22,324	18,216
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Instruments [Line Items]
Fair value	175,673	155,293
Total Assets	1,093,076	1,070,801
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money Market Funds
Financial Instruments [Line Items]
Fair value	730,194	725,311
Quoted Prices in Active Markets for Identical Assets (Level 1) | US Treasury and Agencies
Financial Instruments [Line Items]
Fair value	175,673	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		7,096
Quoted Prices in Active Markets for Identical Assets (Level 1) | Total Short Term Investments
Financial Instruments [Line Items]
Fair value	1,070,752	1,045,489
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual Funds
Financial Instruments [Line Items]
Fair value	22,324	18,216
Significant Other Observable Inputs (Level 2)
Financial Instruments [Line Items]
Fair value	1,214,062	1,179,453
Derivative Assets	5,618	4,929
Total Assets	1,219,680	1,184,382
Derivative Liabilities	244	1,620
Significant Other Observable Inputs (Level 2) | Municipal Notes And Bonds
Financial Instruments [Line Items]
Fair value	252,261	268,746
Significant Other Observable Inputs (Level 2) | Government-Sponsored Enterprises
Financial Instruments [Line Items]
Fair value	38,399	54,805
Significant Other Observable Inputs (Level 2) | Foreign Government Debt Securities
Financial Instruments [Line Items]
Fair value	29,708	24,972
Significant Other Observable Inputs (Level 2) | Corporate Notes And Bonds
Financial Instruments [Line Items]
Fair value	763,238	695,607
Significant Other Observable Inputs (Level 2) | Mortgage Backed Securities - Residential
Financial Instruments [Line Items]
Fair value	26,941	27,365
Significant Other Observable Inputs (Level 2) | Mortgage Backed Securities - Commercial
Financial Instruments [Line Items]
Fair value	103,515	107,958
Significant Other Observable Inputs (Level 2) | Total Short Term Investments
Financial Instruments [Line Items]
Fair value	1,214,062	1,179,453
Significant Unobservable Inputs (Level 3)
Financial Instruments [Line Items]
Derivative Liabilities	$ 49	$ 195