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Fair Value of Cash Equivalents and Marketable Securities
12 Months Ended
Jan. 26, 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 year ended January 26, 2014. Level 3 assets are based on unobservable inputs to the valuation methodology and include our own data about assumptions market participants would use in pricing the asset or liability based on the best information available under the circumstances.
 
Financial assets and liabilities measured at fair value are summarized below:
 
 
 
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.