FINANCIAL INSTRUMENTS - Schedule of Cash, Cash Equivalents, Investments and Restricted Cash and Investments Unrealized Loss Positions (Details) $ in Thousands	Dec. 29, 2019 USD ($)
Fair Value
Unrealized Losses Less than 12 Months	$ 1,077,654
Unrealized Losses 12 Months or Greater	21,730
Total	1,099,384
Gross Unrealized Loss
Unrealized Losses Less than 12 Months	(731)
Unrealized Losses 12 Months or Greater	(263)
Total	(994)
U.S. Treasury and agencies
Fair Value
Unrealized losses less than 12 months, available for sale	325,502
Unrealized losses 12 months or greater, available for sale	0
Total, available for sale	325,502
Gross Unrealized Loss
Unrealized losses less than 12 months, available for sale	(54)
Unrealized losses 12 months or greater, available for sale	0
Total, available for sale	(54)
Mutual funds
Fair Value
Unrealized losses less than 12 months, trading	2,925
Unrealized losses 12 months or greater, trading	7,955
Total, trading	10,880
Gross Unrealized Loss
Unrealized losses less than 12 months, trading	(195)
Unrealized losses 12 months or greater, trading	(257)
Total, trading	(452)
Government-sponsored enterprises
Fair Value
Unrealized losses less than 12 months, available for sale	0
Unrealized losses 12 months or greater, available for sale	6,995
Total, available for sale	6,995
Gross Unrealized Loss
Unrealized losses less than 12 months, available for sale	0
Unrealized losses 12 months or greater, available for sale	(3)
Total, available for sale	(3)
Foreign government bonds
Fair Value
Unrealized losses less than 12 months, available for sale	29,420
Unrealized losses 12 months or greater, available for sale	0
Total, available for sale	29,420
Gross Unrealized Loss
Unrealized losses less than 12 months, available for sale	(6)
Unrealized losses 12 months or greater, available for sale	0
Total, available for sale	(6)
Corporate notes and bonds
Fair Value
Unrealized losses less than 12 months, available for sale	703,002
Unrealized losses 12 months or greater, available for sale	6,780
Total, available for sale	709,782
Gross Unrealized Loss
Unrealized losses less than 12 months, available for sale	(441)
Unrealized losses 12 months or greater, available for sale	(3)
Total, available for sale	(444)
Mortgage backed securities — commercial
Fair Value
Unrealized losses less than 12 months, available for sale	16,805
Unrealized losses 12 months or greater, available for sale	0
Total, available for sale	16,805
Gross Unrealized Loss
Unrealized losses less than 12 months, available for sale	(35)
Unrealized losses 12 months or greater, available for sale	0
Total, available for sale	$ (35)