Fair Value of Cash Equivalents and Marketable Securities (Tables)

12 Months Ended

Jan. 26, 2014

Notes to financial statements [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

			Fair Value Measurement at Reporting Date Using
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs
	January 26, 2014		(Level 1)		(Level 2)
	(In thousands)
Debt securities of United States government agencies (1)	$	1,013,327	$	—	$	1,013,327
Corporate debt securities (2)	1,828,580		—		1,828,580
Mortgage backed securities issued by United States government-sponsored enterprises (3)	188,706		—		188,706
Money market funds (4)	307,865		307,865		—
Debt securities issued by United States Treasury (3)	496,453		—		496,453
Asset-backed securities (3)	257,717		—		257,717
Total assets	$	4,092,648	$	307,865	$	3,784,783

(1) Includes $30.0 million in Cash Equivalents and $983.3 million in Marketable Securities on the Consolidated Balance Sheet.

(2) Includes $234.6 million in Cash Equivalents and $1,594.0 million in Marketable Securities on the Consolidated Balance Sheet.

(3) Included in Marketable Securities on the Consolidated Balance Sheet.

(4) Included in Cash Equivalents on the Consolidated Balance Sheet.