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Fair Value of Cash Equivalents and Marketable Securities
3 Months Ended
Apr. 27, 2014
Notes to financial statements [Abstract]  
Fair Value of Cash Equivalents and Marketable Securities
Fair Value of Cash Equivalents and Marketable Securities

We measure our cash equivalents and marketable securities at fair value. The fair values of our financial assets and liabilities are determined using quoted market prices of identical assets or quoted market prices of similar assets from active markets.  Our Level 1 assets consist of our money market funds. We classify securities within Level 1 assets when the fair value is obtained from real time quotes for transactions in active exchange markets involving identical assets.  Our available-for-sale securities are classified as having Level 2 inputs.  Our Level 2 assets are valued utilizing a market approach where the market prices of similar assets are provided by a variety of independent industry standard data providers to our investment custodian.  There were no significant transfers between Levels 1 and 2 assets for the three months ended April 27, 2014.

Financial assets and liabilities measured at fair value are summarized below:
 
 
 
 
Fair Value Measurement as of April 27, 2014 Using
 
 
 
Quoted Prices 
in Active Markets for Identical Assets
 
Significant Other Observable Inputs
 
April 27, 2014
 
(Level 1)
 
(Level 2)
 
(In thousands)
Corporate debt securities (1)
$
2,067,826

 
$

 
$
2,067,826

Debt securities issued by United States government agencies (2)
732,731

 

 
732,731

Debt securities issued by United States Treasury (2)
584,880

 

 
584,880

Asset-backed securities (2)
357,331

 

 
357,331

Mortgage-backed securities issued by government-sponsored enterprises (2)
202,441

 

 
202,441

Money market funds (3)
103,396

 
103,396

 

Total cash equivalents and marketable securities
$
4,048,605

 
$
103,396

 
$
3,945,209

 
(1)
Includes $106.6 million in cash equivalents and $1.96 billion in marketable securities on the Condensed Consolidated Balance Sheet.
(2)  
Included in marketable securities on the Condensed Consolidated Balance Sheet.
(3)
Included in cash equivalents on the Condensed Consolidated Balance Sheet.