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Restructuring - Narrative (Details) - USD ($)
$ in Millions
Nov. 01, 2025
Feb. 01, 2025
Fiscal 2026 Labor and Store Optimization Initiative    
Restructuring Cost and Reserve [Line Items]    
Restructuring reserve $ 63 $ 0
Fiscal 2024 Restructuring Initiative | Termination benefits    
Restructuring Cost and Reserve [Line Items]    
Restructuring reserve 56 85
Best Buy Health Optimization and China Sourcing Initiative    
Restructuring Cost and Reserve [Line Items]    
Restructuring reserve 15 0
Best Buy Health Optimization and China Sourcing Initiative | Termination benefits    
Restructuring Cost and Reserve [Line Items]    
Restructuring reserve $ 15 $ 0