Financial Instruments (Summary Of Investments) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Dec. 25, 2011	Jun. 26, 2011
Financial Instruments [Line Items]
Fair value	$ 712,856	$ 630,115
Cash [Member]
Financial Instruments [Line Items]
Cost	141,743	190,903
Fair value	141,743	190,903
Fixed Income Money Market Funds [Member]
Financial Instruments [Line Items]
Cost	1,364,760	1,300,098
Fair value	1,364,760	1,300,098
Municipal Notes And Bonds [Member]
Financial Instruments [Line Items]
Cost	398,723	319,913
Unrealized Gain	1,591	1,510
Unrealized (Loss)	(24)	(84)
Fair value	400,290	321,339
US Treasury And Agencies [Member]
Financial Instruments [Line Items]
Cost	6,036	8,462
Unrealized Gain	28	34
Fair value	6,064	8,496
Government-Sponsored Enterprises [Member]
Financial Instruments [Line Items]
Cost	37,846	19,864
Unrealized Gain	39	6
Unrealized (Loss)	(34)	(2)
Fair value	37,851	19,868
Foreign Government Bonds [Member]
Financial Instruments [Line Items]
Cost	1,002	1,004
Unrealized Gain		1
Fair value	1,002	1,005
Corporate Notes And Bonds [Member]
Financial Instruments [Line Items]
Cost	378,021	380,992
Unrealized Gain	827	1,498
Unrealized (Loss)	(584)	(58)
Fair value	378,264	382,432
Mortgage Backed Securities-Residential [Member]
Financial Instruments [Line Items]
Cost	1,257	2,521
Unrealized Gain	86	144
Unrealized (Loss)		(32)
Fair value	1,343	2,633
Mortgage Backed Securities- Commercial [Member]
Financial Instruments [Line Items]
Cost	53,598	60,639
Unrealized Gain	348	277
Unrealized (Loss)	(262)	(187)
Fair value	53,684	60,729
Total Cash And Short-Term Investments [Member]
Financial Instruments [Line Items]
Cost	2,382,986	2,284,396
Unrealized Gain	2,919	3,470
Unrealized (Loss)	(904)	(363)
Fair value	2,385,001	2,287,503
Publicly Traded Equity Securities [Member]
Financial Instruments [Line Items]
Cost	9,320	9,320
Unrealized (Loss)	(1,375)	(1,877)
Fair value	7,945	7,443
Mutual Funds [Member]
Financial Instruments [Line Items]
Cost	18,051	17,975
Unrealized Gain	277	1,492
Unrealized (Loss)	(164)
Fair value	18,164	19,467
Total Financial Instruments [Member]
Financial Instruments [Line Items]
Cost	2,410,357	2,311,691
Unrealized Gain	3,196	4,962
Unrealized (Loss)	(2,443)	(2,240)
Fair value	2,411,110	2,314,413
Cash And Cash Equivalents [Member]
Financial Instruments [Line Items]
Cost	1,506,927	1,492,132
Unrealized Gain	1
Fair value	1,506,928	1,492,132
Short-Term Investments [Member]
Financial Instruments [Line Items]
Cost	710,842	627,008
Unrealized Gain	2,918	3,470
Unrealized (Loss)	(904)	(363)
Fair value	712,856	630,115
Restricted Cash And Investments [Member]
Financial Instruments [Line Items]
Cost	165,217	165,256
Fair value	165,217	165,256
Prepaid Expenses And Other Current Assets [Member]
Financial Instruments [Line Items]
Cost	27,371	27,295
Unrealized Gain	277	1,492
Unrealized (Loss)	(1,539)	(1,877)
Fair value	26,109	26,910
Total [Member]
Financial Instruments [Line Items]
Cost	2,410,357	2,311,691
Unrealized Gain	3,196	4,962
Unrealized (Loss)	(2,443)	(2,240)
Fair value	$ 2,411,110	$ 2,314,413