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Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 29, 2014
Jun. 30, 2013
Financial Instruments [Line Items]    
Fair value $ 2,927,105 $ 2,224,942
Derivatives Assets 1,592 4,929
Total 2,950,455 2,255,183
Derivative liabilities 929 1,815
Municipal Notes And Bonds
    
Financial Instruments [Line Items]    
Fair value 335,433 268,746
Corporate Notes And Bonds
    
Financial Instruments [Line Items]    
Fair value 1,008,788 860,492
Money Market Funds
    
Financial Instruments [Line Items]    
Fair value 1,168,261 725,311
US Treasury and Agencies
    
Financial Instruments [Line Items]    
Fair value 212,587 155,293
Government-Sponsored Enterprises
    
Financial Instruments [Line Items]    
Fair value 27,692 54,805
Foreign Government Bonds
    
Financial Instruments [Line Items]    
Fair value 35,467 24,972
Mortgage Backed Securities - Residential
    
Financial Instruments [Line Items]    
Fair value 26,944 27,365
Mortgage Backed Securities - Commercial
    
Financial Instruments [Line Items]    
Fair value 111,933 107,958
Mutual Funds
    
Financial Instruments [Line Items]    
Fair value 21,758 18,216
Publicly Traded Equity Securities
    
Financial Instruments [Line Items]    
Fair value   7,096
Quoted Prices in Active Markets for Identical Assets (Level 1)
    
Financial Instruments [Line Items]    
Fair value 1,513,397 1,045,489
Total 1,535,155 1,070,801
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) | Money Market Funds
    
Financial Instruments [Line Items]    
Fair value 1,168,261 725,311
Quoted Prices in Active Markets for Identical Assets (Level 1) | US Treasury and Agencies
    
Financial Instruments [Line Items]    
Fair value 212,587 155,293
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual Funds
    
Financial Instruments [Line Items]    
Fair value 21,758 18,216
Quoted Prices in Active Markets for Identical Assets (Level 1) | Publicly Traded Equity Securities
    
Financial Instruments [Line Items]    
Fair value   7,096
Significant Other Observable Inputs (Level 2)
    
Financial Instruments [Line Items]    
Fair value 1,413,708 1,179,453
Derivatives Assets 1,592 4,929
Total 1,415,300 1,184,382
Derivative liabilities 923 1,620
Significant Other Observable Inputs (Level 2) | Municipal Notes And Bonds
    
Financial Instruments [Line Items]    
Fair value 335,433 268,746
Significant Other Observable Inputs (Level 2) | Corporate Notes And Bonds
    
Financial Instruments [Line Items]    
Fair value 876,239 695,607
Significant Other Observable Inputs (Level 2) | Government-Sponsored Enterprises
    
Financial Instruments [Line Items]    
Fair value 27,692 54,805
Significant Other Observable Inputs (Level 2) | Foreign Government Bonds
    
Financial Instruments [Line Items]    
Fair value 35,467 24,972
Significant Other Observable Inputs (Level 2) | Mortgage Backed Securities - Residential
    
Financial Instruments [Line Items]    
Fair value 26,944 27,365
Significant Other Observable Inputs (Level 2) | Mortgage Backed Securities - Commercial
    
Financial Instruments [Line Items]    
Fair value 111,933 107,958
Significant Unobservable Inputs (Level 3)
    
Financial Instruments [Line Items]    
Derivative liabilities $ 6 $ 195