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Valuation and Qualifying Accounts
 12 Months Ended
Jan. 28, 2017
Valuation and Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts
Schedule II

Valuation and Qualifying Accounts
($ in millions)
 
Balance at
Beginning
of Period
 
Charged to
Expenses or
Other Accounts
 
Other(1)
 
Balance at
End of
Period
Year ended January 28, 2017
 
 
 
 
 
 
 
Allowance for doubtful accounts
$
49

 
$
44

 
$
(41
)
 
$
52

Year ended January 30, 2016
 
 
 
 
 
 
 
Allowance for doubtful accounts
$
59

 
$
30

 
$
(40
)
 
$
49

Year ended January 31, 2015
 
 
 
 
 
 
 
Allowance for doubtful accounts
$
104

 
$
1

 
$
(46
)
 
$
59

(1)
Includes bad debt write-offs and recoveries, acquisitions and the effect of foreign currency fluctuations.