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Goodwill and Intangible Assets - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Nov. 01, 2025
Aug. 02, 2025
Jan. 31, 2026
Feb. 01, 2025
Intangible Assets [Line Items]        
Goodwill     $ 790 $ 908
Impairment   $ 16    
Best Buy Health        
Intangible Assets [Line Items]        
Goodwill     298 $ 416
Best Buy Health | Domestic        
Intangible Assets [Line Items]        
Goodwill and intangible asset impairments $ 118      
Goodwill     $ 298  
Goodwill, Impairment Loss, Statement of Income or Comprehensive Income [Extensible Enumeration] Goodwill and intangible asset impairments