FINANCIAL INSTRUMENTS - Schedule of Cash, Cash Equivalents, Investments and Restricted Cash and Investments Unrealized Loss Positions (Details) $ in Thousands	Sep. 24, 2017 USD ($)
Fair Value
Unrealized Losses Less than 12 Months	$ 2,182,398
Unrealized Losses 12 Months or Greater	4,640
Total	2,187,038
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(5,942)
Unrealized Losses 12 Months or Greater	(37)
Total	(5,979)
U.S. Treasury and agencies
Fair Value
Unrealized Losses Less than 12 Months	660,429
Unrealized Losses 12 Months or Greater	0
Total	660,429
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(2,671)
Unrealized Losses 12 Months or Greater	0
Total	(2,671)
Mutual funds
Fair Value
Unrealized Losses Less than 12 Months	3,122
Unrealized Losses 12 Months or Greater	0
Total	3,122
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(70)
Unrealized Losses 12 Months or Greater	0
Total	(70)
Municipal notes and bonds
Fair Value
Unrealized Losses Less than 12 Months	18,653
Unrealized Losses 12 Months or Greater	0
Total	18,653
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(21)
Unrealized Losses 12 Months or Greater	0
Total	(21)
Government-sponsored enterprises
Fair Value
Unrealized Losses Less than 12 Months	55,297
Unrealized Losses 12 Months or Greater	0
Total	55,297
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(322)
Unrealized Losses 12 Months or Greater	0
Total	(322)
Foreign government bonds
Fair Value
Unrealized Losses Less than 12 Months	33,729
Unrealized Losses 12 Months or Greater	0
Total	33,729
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(128)
Unrealized Losses 12 Months or Greater	0
Total	(128)
Corporate notes and bonds
Fair Value
Unrealized Losses Less than 12 Months	1,282,655
Unrealized Losses 12 Months or Greater	0
Total	1,282,655
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(2,376)
Unrealized Losses 12 Months or Greater	0
Total	(2,376)
Mortgage backed securities — residential
Fair Value
Unrealized Losses Less than 12 Months	30,210
Unrealized Losses 12 Months or Greater	2,006
Total	32,216
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(93)
Unrealized Losses 12 Months or Greater	(23)
Total	(116)
Mortgage backed securities — commercial
Fair Value
Unrealized Losses Less than 12 Months	98,303
Unrealized Losses 12 Months or Greater	2,634
Total	100,937
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(261)
Unrealized Losses 12 Months or Greater	(14)
Total	$ (275)