Fair Value of Financial Assets and Liabilities (Tables)

9 Months Ended

Oct. 26, 2014

Notes to financial statements [Abstract]

Financial assets measured at Fair Value

			Fair Value Measurement as of October 26, 2014 Using
			Quoted Prices  in Active Markets for Identical Assets		Significant Other Observable Inputs
	October 26, 2014		(Level 1)		(Level 2)
	(In thousands)
Corporate debt securities (1)	$	1,957,060	$	—	$	1,957,060
Debt securities of United States government agencies (2)	586,125		—		586,125
Debt securities issued by United States Treasury (2)	578,013		—		578,013
Asset-backed securities (2)	437,751		—		437,751
Mortgage-backed securities issued by government-sponsored enterprises (2)	277,684		—		277,684
Foreign government bonds (2)	85,378		—		85,378
Money market funds (3)	72,881		72,881		—
Total cash equivalents and marketable securities	$	3,994,892	$	72,881	$	3,922,011

(1) Includes $75.9 million in cash equivalents and $1.88 billion in marketable securities on the Condensed Consolidated Balance Sheets.

(2)   Included in marketable securities on the Condensed Consolidated Balance Sheets.

(3) Included in cash equivalents on the Condensed Consolidated Balance Sheet