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Commitments and Contingencies (Details)
$ in Millions
6 Months Ended
Jul. 27, 2018
claim
Jun. 30, 2020
USD ($)
Jul. 29, 2020
USD ($)
Jul. 22, 2020
USD ($)
Jan. 15, 2020
USD ($)
Jul. 31, 2019
USD ($)
Loss Contingencies [Line Items]            
Non-cancelable contractual commitments   $ 8,300        
Commitment period   5 years        
Number of class actions filed | claim 2          
FTC Inquiry            
Loss Contingencies [Line Items]            
Loss contingency accrual           $ 5,000
Illinois Biometric Information Privacy Act            
Loss Contingencies [Line Items]            
Loss contingency accrual         $ 550  
Subsequent Event            
Loss Contingencies [Line Items]            
Non-cancelable contractual commitments     $ 1,000      
Settled Litigation | Subsequent Event | Illinois Biometric Information Privacy Act            
Loss Contingencies [Line Items]            
Loss contingency accrual       $ 650