Summary of Investments (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
Cash
Financial Instruments [Line Items]
Cost	230,713	438,813
Fair Value	230,713	438,813
Fixed Income Money Market Funds
Financial Instruments [Line Items]
Cost	926,971	725,311
Fair Value	926,971	725,311
Municipal Notes And Bonds
Financial Instruments [Line Items]
Cost	247,111	268,390
Unrealized Gain	894	805
Unrealized (Loss)	(141)	(449)
Fair Value	247,864	268,746
US Treasury and Agencies
Financial Instruments [Line Items]
Cost	154,440	155,648
Unrealized Gain	77	18
Unrealized (Loss)	(116)	(373)
Fair Value	154,401	155,293
Government-Sponsored Enterprises
Financial Instruments [Line Items]
Cost	54,674	54,835
Unrealized Gain	79	65
Unrealized (Loss)	(40)	(95)
Fair Value	54,713	54,805
Foreign Governments Bonds
Financial Instruments [Line Items]
Cost	23,628	24,950
Unrealized Gain	79	47
Unrealized (Loss)	(8)	(25)
Fair Value	23,699	24,972
Corporate Notes And Bonds
Financial Instruments [Line Items]
Cost	844,524	861,109
Unrealized Gain	1,568	1,328
Unrealized (Loss)	(997)	(1,945)
Fair Value	845,095	860,492
Mortgage Backed Securities - Residential
Financial Instruments [Line Items]
Cost	25,522	27,618
Unrealized Gain	18	29
Unrealized (Loss)	(322)	(282)
Fair Value	25,218	27,365
Mortgage Backed Securities - Commercial
Financial Instruments [Line Items]
Cost	103,407	108,204
Unrealized Gain	344	426
Unrealized (Loss)	(659)	(672)
Fair Value	103,092	107,958
Total Cash And Short Term Investments
Financial Instruments [Line Items]
Cost	2,621,574	2,664,878
Unrealized Gain	3,309	2,718
Unrealized (Loss)	(2,283)	(3,841)
Fair Value	2,622,600	2,663,755
Publicly Traded Equity Securities
Financial Instruments [Line Items]
Cost	5,584	5,610
Unrealized Gain	250	1,486
Fair Value	5,834	7,096
Private Equity Securities
Financial Instruments [Line Items]
Cost	5,000	5,000
Fair Value	5,000	5,000
Mutual Funds
Financial Instruments [Line Items]
Cost	17,804	16,611
Unrealized Gain	1,523	1,619
Unrealized (Loss)	(92)	(14)
Fair Value	19,235	18,216
Total Financial Instruments
Financial Instruments [Line Items]
Cost	2,639,378	2,692,099
Unrealized Gain	4,832	5,823
Unrealized (Loss)	(2,375)	(3,855)
Fair Value	2,641,835	2,694,067
Cash and Cash Equivalents
Financial Instruments [Line Items]
Cost	1,156,184	1,162,473
Fair Value	1,156,184	1,162,473
Short-term Investments
Financial Instruments [Line Items]
Cost	1,299,005	1,335,868
Unrealized Gain	3,309	2,718
Unrealized (Loss)	(2,283)	(3,841)
Fair Value	1,300,031	1,334,745
Restricted Cash And Investments
Financial Instruments [Line Items]
Cost	166,385	166,536
Fair Value	166,385	166,536
Other Assets
Financial Instruments [Line Items]
Cost	17,804	27,222
Unrealized Gain	1,523	3,105
Unrealized (Loss)	(92)	(14)
Fair Value	19,235	30,313
Total
Financial Instruments [Line Items]
Cost	2,639,378	2,692,099
Unrealized Gain	4,832	5,823
Unrealized (Loss)	(2,375)	(3,855)
Fair Value	$ 2,641,835	$ 2,694,067