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Comprehensive Income (Tables)
 3 Months Ended
May 05, 2018
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
The following tables provide a reconciliation of the components of accumulated other comprehensive income, net of tax, attributable to Best Buy Co., Inc. for the three months ended May 5, 2018, and April 29, 2017 ($ in millions):
 
Foreign Currency Translation
Balances at February 3, 2018
$
314

Foreign currency translation adjustments
(4
)
Balances at May 5, 2018
$
310

 
 
Balance at January 28, 2017
$
279

Foreign currency translation adjustments
(13
)
Balance at April 29, 2017
$
266