Cash, Cash Equivalents, Investments, Restricted Cash and Investments and Other Assets Measured at Fair Value on Recurring Basis (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 27, 2015	Dec. 28, 2014	Dec. 27, 2015	Dec. 28, 2014	Jun. 28, 2015
Financial Instruments [Line Items]
Total cost	$ 4,725,630,000		$ 4,725,630,000		$ 4,283,009,000
Unrealized gain	3,544,000		3,544,000		4,261,000
Unrealized loss	(9,971,000)		(9,971,000)		(6,352,000)
Marketable securities	4,719,203,000		4,719,203,000		4,280,918,000
Cash and Cash Equivalents	1,967,873,000		1,967,873,000		1,501,539,000
Investments	2,507,607,000		2,507,607,000		2,574,947,000
Restricted Cash & Investments	207,568,000		207,568,000		170,969,000
Other Assets	36,155,000		36,155,000		33,463,000
Other than temporary impairment included in net realized gains (losses)			0	$ 0
Gross realized gains	600,000	$ 400,000	800,000	900,000
Gross realized losses from sale of investments	(1,400,000)	$ (400,000)	(2,000,000)	$ (1,000,000)
Fair Value Level 1
Financial Instruments [Line Items]
Total cost	2,095,006,000		2,095,006,000		1,735,035,000
Unrealized gain	2,735,000		2,735,000		2,998,000
Unrealized loss	(2,514,000)		(2,514,000)		(908,000)
Marketable securities	2,095,227,000		2,095,227,000		1,737,125,000
Cash and Cash Equivalents	1,583,084,000		1,583,084,000		1,222,613,000
Investments	273,114,000		273,114,000		315,291,000
Restricted Cash & Investments	202,874,000		202,874,000		165,758,000
Other Assets	36,155,000		36,155,000		33,463,000
Fair Value Level 2
Financial Instruments [Line Items]
Total cost	2,241,141,000		2,241,141,000		2,271,311,000
Unrealized gain	809,000		809,000		1,263,000
Unrealized loss	(7,457,000)		(7,457,000)		(5,444,000)
Marketable securities	2,234,493,000		2,234,493,000		2,267,130,000
Cash and Cash Equivalents					7,474,000
Investments	2,234,493,000		2,234,493,000		2,259,656,000
Cash
Financial Instruments [Line Items]
Total cost	389,483,000		389,483,000		276,663,000
Marketable securities	389,483,000		389,483,000		276,663,000
Cash and Cash Equivalents	384,789,000		384,789,000		271,452,000
Restricted Cash & Investments	4,694,000		4,694,000		5,211,000
Time Deposit | Fair Value Level 1
Financial Instruments [Line Items]
Total cost	175,259,000		175,259,000		177,567,000
Marketable securities	175,259,000		175,259,000		177,567,000
Cash and Cash Equivalents	42,438,000		42,438,000		44,738,000
Restricted Cash & Investments	132,822,000		132,822,000		132,829,000
Money Market Funds | Fair Value Level 1
Financial Instruments [Line Items]
Total cost	1,540,647,000		1,540,647,000		1,177,875,000
Marketable securities	1,540,647,000		1,540,647,000		1,177,875,000
Cash and Cash Equivalents	1,540,646,000		1,540,646,000		1,177,875,000
U.S. Treasury and Agencies | Fair Value Level 1
Financial Instruments [Line Items]
Total cost	345,105,000		345,105,000		349,009,000
Unrealized gain	2,000		2,000		72,000
Unrealized loss	(1,941,000)		(1,941,000)		(861,000)
Marketable securities	343,166,000		343,166,000		348,220,000
Investments	273,114,000		273,114,000		315,291,000
Restricted Cash & Investments	70,052,000		70,052,000		32,929,000
U.S. Treasury and Agencies | Fair Value Level 2
Financial Instruments [Line Items]
Total cost	8,028,000		8,028,000		4,007,000
Unrealized gain	0		0		0
Unrealized loss	(110,000)		(110,000)		(4,000)
Marketable securities	7,918,000		7,918,000		4,003,000
Investments	7,918,000		7,918,000		4,003,000
Mutual Funds | Fair Value Level 1
Financial Instruments [Line Items]
Total cost	33,995,000		33,995,000		30,584,000
Unrealized gain	2,733,000		2,733,000		2,926,000
Unrealized loss	(573,000)		(573,000)		(47,000)
Marketable securities	36,155,000		36,155,000		33,463,000
Other Assets	36,155,000		36,155,000		33,463,000
Municipal Notes and Bonds | Fair Value Level 2
Financial Instruments [Line Items]
Total cost	643,087,000		643,087,000		659,550,000
Unrealized gain	408,000		408,000		429,000
Unrealized loss	(317,000)		(317,000)		(335,000)
Marketable securities	643,178,000		643,178,000		659,644,000
Cash and Cash Equivalents					7,474,000
Investments	643,178,000		643,178,000		652,170,000
Government-Sponsored Enterprises | Fair Value Level 2
Financial Instruments [Line Items]
Total cost	47,944,000		47,944,000		53,612,000
Unrealized gain	0		0		2,000
Unrealized loss	(270,000)		(270,000)		(249,000)
Marketable securities	47,674,000		47,674,000		53,365,000
Investments	47,674,000		47,674,000		53,365,000
Foreign Government Bonds | Fair Value Level 2
Financial Instruments [Line Items]
Total cost	46,394,000		46,394,000		50,336,000
Unrealized gain	1,000		1,000		31,000
Unrealized loss	(229,000)		(229,000)		(161,000)
Marketable securities	46,166,000		46,166,000		50,206,000
Investments	46,166,000		46,166,000		50,206,000
Corporate Notes and Bonds | Fair Value Level 2
Financial Instruments [Line Items]
Total cost	1,343,415,000		1,343,415,000		1,329,587,000
Unrealized gain	328,000		328,000		685,000
Unrealized loss	(5,401,000)		(5,401,000)		(3,797,000)
Marketable securities	1,338,342,000		1,338,342,000		1,326,475,000
Investments	1,338,342,000		1,338,342,000		1,326,475,000
Mortgage Backed Securities — Residential | Fair Value Level 2
Financial Instruments [Line Items]
Total cost	35,611,000		35,611,000		32,231,000
Unrealized gain	65,000		65,000		72,000
Unrealized loss	(371,000)		(371,000)		(292,000)
Marketable securities	35,305,000		35,305,000		32,011,000
Investments	35,305,000		35,305,000		32,011,000
Mortgage Backed Securities — Commercial | Fair Value Level 2
Financial Instruments [Line Items]
Total cost	116,662,000		116,662,000		141,988,000
Unrealized gain	7,000		7,000		44,000
Unrealized loss	(759,000)		(759,000)		(606,000)
Marketable securities	115,910,000		115,910,000		141,426,000
Investments	$ 115,910,000		$ 115,910,000		$ 141,426,000