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Accumulated Other Comprehensive Income (Tables)
 12 Months Ended
Jan. 31, 2015
Statement of Comprehensive Income [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Changes in accumulated OCI by component, net of tax, are as follows:
($ in millions)
Foreign Currency Translation
 
Cash Flow Hedges
 
Total
Balance at February 1, 2014
$
107

 
$
28

 
$
135

 Foreign currency translation
(47
)
 
—

 
(47
)
 Change in fair value of derivative financial instruments
—

 
118

 
118

 Amounts reclassified from accumulated OCI
—

 
(41
)
 
(41
)
 Other comprehensive income (loss), net
(47
)
 
77

 
30

Balance at January 31, 2015
$
60

 
$
105

 
$
165

 
 
 
 
 
 
($ in millions)
Foreign Currency Translation
 
Cash Flow Hedges
 
Total
Balance at February 2, 2013
$
158

 
$
23

 
$
181

Foreign currency translation
(51
)
 
—

 
(51
)
Change in fair value of derivative financial instruments
—

 
48

 
48

Amounts reclassified from accumulated OCI
—

 
(43
)
 
(43
)
Other comprehensive income (loss), net
(51
)
 
5

 
(46
)
Balance at February 1, 2014
$
107

 
$
28

 
$
135