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Shareholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jul. 28, 2019
Jul. 28, 2019
Jul. 29, 2018
Jan. 27, 2019
Equity [Abstract]        
Dividends paid $ 97 $ 195 $ 182  
Aggregated number of shares repurchased under stock repurchase program (in shares) 260,000,000 260,000,000    
Aggregated cost of shares repurchased $ 7,080 $ 7,080    
Remaining authorized repurchase amount $ 7,240 $ 7,240    
Preferred stock outstanding (in shares) 0 0   0
Authorized number of shares of common stock (in shares) 2,000,000,000.00 2,000,000,000.00    
Par value of common stock (in dollars per share) $ 0.001 $ 0.001