FINANCIAL INSTRUMENTS - Schedule of Cash, Cash Equivalents, Investments and Restricted Cash and Investments Unrealized Loss Positions (Details) $ in Thousands	Dec. 24, 2017 USD ($)
Fair Value
Unrealized Losses Less than 12 Months	$ 3,230,450
Unrealized Losses 12 Months or Greater	348,937
Total	3,579,387
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(19,938)
Unrealized Losses 12 Months or Greater	(4,666)
Total	(24,604)
U.S. Treasury and agencies
Fair Value
Unrealized Losses Less than 12 Months	659,453
Unrealized Losses 12 Months or Greater	161,386
Total	820,839
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(6,546)
Unrealized Losses 12 Months or Greater	(2,482)
Total	(9,028)
Municipal notes and bonds
Fair Value
Unrealized Losses Less than 12 Months	168,189
Unrealized Losses 12 Months or Greater	0
Total	168,189
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(649)
Unrealized Losses 12 Months or Greater	0
Total	(649)
Government-sponsored enterprises
Fair Value
Unrealized Losses Less than 12 Months	27,681
Unrealized Losses 12 Months or Greater	19,533
Total	47,214
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(163)
Unrealized Losses 12 Months or Greater	(439)
Total	(602)
Foreign government bonds
Fair Value
Unrealized Losses Less than 12 Months	51,879
Unrealized Losses 12 Months or Greater	8,425
Total	60,304
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(382)
Unrealized Losses 12 Months or Greater	(108)
Total	(490)
Corporate notes and bonds
Fair Value
Unrealized Losses Less than 12 Months	2,160,923
Unrealized Losses 12 Months or Greater	152,403
Total	2,313,326
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(11,215)
Unrealized Losses 12 Months or Greater	(1,566)
Total	(12,781)
Mortgage backed securities — residential
Fair Value
Unrealized Losses Less than 12 Months	46,771
Unrealized Losses 12 Months or Greater	1,789
Total	48,560
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(309)
Unrealized Losses 12 Months or Greater	(16)
Total	(325)
Mortgage backed securities — commercial
Fair Value
Unrealized Losses Less than 12 Months	115,554
Unrealized Losses 12 Months or Greater	5,401
Total	120,955
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(674)
Unrealized Losses 12 Months or Greater	(55)
Total	$ (729)