Financial Instruments (Summary Of Investments) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Mar. 25, 2012	Jun. 26, 2011
Financial Instruments [Line Items]
Fair value	$ 993,696	$ 630,115
Cash [Member]
Financial Instruments [Line Items]
Cost	124,949	190,903
Fair value	124,949	190,903
Fixed Income Money Market Funds [Member]
Financial Instruments [Line Items]
Cost	1,285,652	1,300,098
Fair value	1,285,652	1,300,098
Municipal Notes And Bonds [Member]
Financial Instruments [Line Items]
Cost	358,776	319,913
Unrealized Gain	1,710	1,510
Unrealized (Loss)	(22)	(84)
Fair value	360,464	321,339
US Treasury And Agencies [Member]
Financial Instruments [Line Items]
Cost	77,609	8,462
Unrealized Gain	20	34
Unrealized (Loss)	(106)
Fair value	77,523	8,496
Government-Sponsored Enterprises [Member]
Financial Instruments [Line Items]
Cost	48,916	19,864
Unrealized Gain	68	6
Unrealized (Loss)	(49)	(2)
Fair value	48,935	19,868
Foreign Governments Bonds [Member]
Financial Instruments [Line Items]
Cost	2,549	1,004
Unrealized Gain		1
Unrealized (Loss)	(5)
Fair value	2,544	1,005
Corporate Notes And Bonds [Member]
Financial Instruments [Line Items]
Cost	596,456	380,992
Unrealized Gain	1,220	1,498
Unrealized (Loss)	(493)	(58)
Fair value	597,183	382,432
Mortgage Backed Securities-Residential [Member]
Financial Instruments [Line Items]
Cost	11,515	2,521
Unrealized Gain	74	144
Unrealized (Loss)	(27)	(32)
Fair value	11,562	2,633
Mortgage Backed Securities-Commercial [Member]
Financial Instruments [Line Items]
Cost	59,857	60,639
Unrealized Gain	694	277
Unrealized (Loss)	(180)	(187)
Fair value	60,371	60,729
Total Cash And Short-Term Investments [Member]
Financial Instruments [Line Items]
Cost	2,566,279	2,284,396
Unrealized Gain	3,786	3,470
Unrealized (Loss)	(882)	(363)
Fair value	2,569,183	2,287,503
Publicly Traded Equity Securities [Member]
Financial Instruments [Line Items]
Cost	9,320	9,320
Unrealized (Loss)	(2,019)	(1,877)
Fair value	7,301	7,443
Mutual Funds [Member]
Financial Instruments [Line Items]
Cost	23,541	17,975
Unrealized Gain	1,138	1,492
Unrealized (Loss)	(40)
Fair value	24,639	19,467
Total Financial Instruments [Member]
Financial Instruments [Line Items]
Cost	2,599,140	2,311,691
Unrealized Gain	4,924	4,962
Unrealized (Loss)	(2,941)	(2,240)
Fair value	2,601,123	2,314,413
Cash And Cash Equivalents [Member]
Financial Instruments [Line Items]
Cost	1,410,267	1,492,132
Fair value	1,410,267	1,492,132
Short-Term Investments [Member]
Financial Instruments [Line Items]
Cost	990,792	627,008
Unrealized Gain	3,786	3,470
Unrealized (Loss)	(882)	(363)
Fair value	993,696	630,115
Restricted Cash And Investments [Member]
Financial Instruments [Line Items]
Cost	165,220	165,256
Fair value	165,220	165,256
Other Assets [Member]
Financial Instruments [Line Items]
Cost	32,861	27,295
Unrealized Gain	1,138	1,492
Unrealized (Loss)	(2,059)	(1,877)
Fair value	31,940	26,910
Total [Member]
Financial Instruments [Line Items]
Cost	2,599,140	2,311,691
Unrealized Gain	4,924	4,962
Unrealized (Loss)	(2,941)	(2,240)
Fair value	$ 2,601,123	$ 2,314,413