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Valuation and Qualifying Accounts
 12 Months Ended
Jan. 31, 2015
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 31, 2015
 
 
 
 
 
 
 
Allowance for doubtful accounts
$
104

 
$
1

 
$
(46
)
 
$
59

Year ended February 1, 2014
 
 
 
 
 
 
 
Allowance for doubtful accounts
$
92

 
$
76

 
$
(64
)
 
$
104

Year ended February 2, 2013
 
 
 
 
 
 
 
Allowance for doubtful accounts
$
72

 
$
34

 
$
(14
)
 
$
92

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