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Commitments and Contingencies - Contingent consideration (Details) - TBBC
$ in Millions
12 Months Ended
Feb. 03, 2018
USD ($)
individual
Feb. 01, 2020
USD ($)
Feb. 02, 2019
USD ($)
Business combination      
Contingent consideration, High end of range $ 4    
Period over which contingent consideration will be payable 4 years    
Number of sellers that is an employee | individual 1    
Maximum      
Business combination      
Contingent consideration earned, payable next fiscal year   $ 1 $ 1