XML 64 R48.htm IDEA: XBRL DOCUMENT v3.8.0.1
Fair Value of Financial Assets and Liabilities (Details) - USD ($)
$ in Millions
Jan. 28, 2018
Jan. 29, 2017
Fair Value, Inputs, Level 1 | Money market funds    
Financial assets and liabilities measured at fair value    
Estimated fair value $ 3,789 $ 321
Fair Value, Inputs, Level 2    
Financial assets and liabilities measured at fair value    
1.00% Convertible Senior Notes [1] 189 4,474
Interest rate swap 0 [2] 2
Fair Value, Inputs, Level 2 | Corporate debt securities    
Financial assets and liabilities measured at fair value    
Estimated fair value 1,295 2,388
Fair Value, Inputs, Level 2 | Debt securities of United States government agencies    
Financial assets and liabilities measured at fair value    
Estimated fair value 815 1,188
Fair Value, Inputs, Level 2 | Debt securities issued by the United States Treasury    
Financial assets and liabilities measured at fair value    
Estimated fair value 573 850
Fair Value, Inputs, Level 2 | Asset-backed securities    
Financial assets and liabilities measured at fair value    
Estimated fair value 252 489
Fair Value, Inputs, Level 2 | Mortgage-backed securities issued by United States government-sponsored enterprises    
Financial assets and liabilities measured at fair value    
Estimated fair value 130 162
Fair Value, Inputs, Level 2 | Foreign government bonds    
Financial assets and liabilities measured at fair value    
Estimated fair value 41 70
2021 Notes [Member] | Fair Value, Inputs, Level 2    
Financial assets and liabilities measured at fair value    
Long-term debt [1] 982 975
2026 Notes [Member] | Fair Value, Inputs, Level 2    
Financial assets and liabilities measured at fair value    
Long-term debt [1] $ 986 $ 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 11 of these Notes to the Consolidated Financial Statements for additional information.
[2] In January 2018, we terminated the interest rate swap. Refer to Note 9 of these Notes to Consolidated Financial Statements for additional information.