Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 23, 2012	Jun. 24, 2012
Financial Instruments [Line Items]
Fair value	$ 1,312,767	$ 1,297,931
Derivative Assets	2,698	5,020
Total Assets	2,682,289	2,816,864
Derivative Liabilities	2,990	4,529
Money Market Funds
Financial Instruments [Line Items]
Fair value	1,175,847	1,318,812
Municipal Notes And Bonds
Financial Instruments [Line Items]
Fair value	325,648	322,567
US Treasury and Agencies
Financial Instruments [Line Items]
Fair value	179,213	137,446
Government-Sponsored Enterprises
Financial Instruments [Line Items]
Fair value	118,105	123,268
Foreign Government Debt Securities
Financial Instruments [Line Items]
Fair value	7,882	6,358
Corporate Notes And Bonds
Financial Instruments [Line Items]
Fair value	750,919	768,901
Mortgage Backed Securities- Residential
Financial Instruments [Line Items]
Fair value	15,221	25,972
Mortgage Backed Securities - Commercial
Financial Instruments [Line Items]
Fair value	81,463	84,853
Total Short Term Investments
Financial Instruments [Line Items]
Fair value	2,654,298	2,788,177
Equities
Financial Instruments [Line Items]
Fair value	5,740
Mutual Funds
Financial Instruments [Line Items]
Fair value	19,553	17,754
Publicly Traded Equity Securities
Financial Instruments [Line Items]
Fair value		5,913
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Instruments [Line Items]
Fair value	179,213	130,624
Total Assets	1,545,238	1,637,988
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money Market Funds
Financial Instruments [Line Items]
Fair value	1,175,847	1,318,812
Quoted Prices in Active Markets for Identical Assets (Level 1) | US Treasury and Agencies
Financial Instruments [Line Items]
Fair value	179,213	130,624
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) | Total Short Term Investments
Financial Instruments [Line Items]
Fair value	1,519,945	1,614,321
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equities
Financial Instruments [Line Items]
Fair value	5,740
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual Funds
Financial Instruments [Line Items]
Fair value	19,553	17,754
Quoted Prices in Active Markets for Identical Assets (Level 1) | Publicly Traded Equity Securities
Financial Instruments [Line Items]
Fair value		5,913
Significant Other Observable Inputs (Level 2)
Financial Instruments [Line Items]
Fair value	1,133,554	1,167,307
Derivative Assets	2,698	5,020
Total Assets	1,137,051	1,178,876
Derivative Liabilities	2,607	4,328
Significant Other Observable Inputs (Level 2) | Municipal Notes And Bonds
Financial Instruments [Line Items]
Fair value	325,648	322,567
Significant Other Observable Inputs (Level 2) | US Treasury and Agencies
Financial Instruments [Line Items]
Fair value		6,822
Significant Other Observable Inputs (Level 2) | Government-Sponsored Enterprises
Financial Instruments [Line Items]
Fair value	118,105	123,268
Significant Other Observable Inputs (Level 2) | Foreign Government Debt Securities
Financial Instruments [Line Items]
Fair value	7,882	6,358
Significant Other Observable Inputs (Level 2) | Corporate Notes And Bonds
Financial Instruments [Line Items]
Fair value	586,034	604,016
Significant Other Observable Inputs (Level 2) | Mortgage Backed Securities- Residential
Financial Instruments [Line Items]
Fair value	15,221	25,972
Significant Other Observable Inputs (Level 2) | Mortgage Backed Securities - Commercial
Financial Instruments [Line Items]
Fair value	81,463	84,853
Significant Other Observable Inputs (Level 2) | Total Short Term Investments
Financial Instruments [Line Items]
Fair value	1,134,353	1,173,856
Significant Unobservable Inputs (Level 3)
Financial Instruments [Line Items]
Derivative Liabilities	$ 383	$ 201