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Comprehensive Income (Tables)
 6 Months Ended
Jul. 29, 2017
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 and six months ended July 29, 2017, and July 30, 2016 ($ in millions):
 
Foreign Currency Translation
Balances at April 29, 2017
$
266

Foreign currency translation adjustments
55

Balances at July 29, 2017
$
321

 
 
Balances at January 28, 2017
$
279

Foreign currency translation adjustments
42

Balances at July 29, 2017
$
321

 
 
Balances at April 30, 2016
$
316

Foreign currency translation adjustments
(20
)
Balances at July 30, 2016
$
296

 
 
Balances at January 30, 2016
$
271

Foreign currency translation adjustments
25

Balances at July 30, 2016
$
296