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Fair Value of Financial Assets and Liabilities
9 Months Ended
Oct. 27, 2019
Fair Value Disclosures [Abstract]  
Fair Value of Financial Assets and Liabilities Fair Value of Financial Assets and Liabilities
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. We review fair value hierarchy classification on a quarterly basis.
 
 
Fair Value at
 
Pricing Category
 
October 27, 2019
 
January 27, 2019
 
 
 
(In millions)
Assets
 
 
 
 
 
Cash equivalents and marketable securities:
 
 
 
Debt securities issued by the United States Treasury
Level 2
 
$
5,883

 
$
1,492

Corporate debt securities
Level 2
 
$
1,293

 
$
2,620

Debt securities of United States government agencies
Level 2
 
$
1,204

 
$
2,280

Money market funds
Level 1
 
$
1,070

 
$
483

Foreign government debt securities
Level 2
 
$
178

 
$
209

Certificates of deposit
Level 2
 
$
25

 
$

Asset-backed securities
Level 2
 
$
4

 
$
151

Mortgage-backed securities issued by United States government-sponsored enterprises
Level 2
 
$

 
$
89

 
 
 
 
 
 
Liabilities
 
 
 
 
 
Other noncurrent liabilities:
 
 
 
 
 
2.20% Notes Due 2021 (1)
Level 2
 
$
1,003

 
$
978

3.20% Notes Due 2026 (1)
Level 2
 
$
1,051

 
$
961


(1) These liabilities are carried on our Consolidated Balance Sheets at their original issuance value, net of unamortized debt discount and issuance costs, and are not marked to fair value each period. Refer to Note 12 of these Notes to Condensed Consolidated Financial Statements for additional information.