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Fair Value Measurements (Tables)
 9 Months Ended
Oct. 27, 2012
Fair Value Disclosures [Abstract]  
Financial Assets And Liabilities Measured At Fair Value On Recurring Basis
Financial assets and liabilities measured at fair value on a recurring basis and cash equivalents and short-term investments held at amortized cost are as follows:
 
 
 
Fair Value Measurements at Reporting Date Using
($ in millions)
October 27, 2012
 
Quoted Prices in
Active Markets for
Identical Assets
(Level 1)
 
Significant Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
Assets:
 
 
 
 
 
 
 
Cash equivalents
$
840

 
$
184

 
$
656

 
$
—

Short-term investments
50

 
—

 
50

 
—

Derivative financial instruments
12

 
—

 
12

 
—

Deferred compensation plan assets
27

 
27

 
—

 
—

Total
$
929

 
$
211

 
$
718

 
$
—

Liabilities:
 
 
 
 
 
 
 
Derivative financial instruments
$
14

 
$
—

 
$
14

 
$
—

 
 
 
Fair Value Measurements at Reporting Date Using
($ in millions)
January 28, 2012
 
Quoted Prices in
Active Markets for
Identical Assets
(Level 1)
 
Significant Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
Assets:
 
 
 
 
 
 
 
Cash equivalents
$
1,009

 
$
224

 
$
785

 
$
—

Short-term investments
—

 
—

 
—

 
—

Derivative financial instruments
13

 
—

 
13

 
—

Deferred compensation plan assets
22

 
22

 
—

 
—

Total
$
1,044

 
$
246

 
$
798

 
$
—

Liabilities:
 
 
 
 
 
 
 
Derivative financial instruments
$
14

 
$
—

 
$
14

 
$
—

 
 
 
Fair Value Measurements at Reporting Date Using
($ in millions)
October 29, 2011
 
Quoted Prices in
Active Markets for
Identical Assets
(Level 1)
 
Significant  Other
Observable
Inputs
(Level 2)
 
Significant
Unobservable
Inputs
(Level 3)
Assets:
 
 
 
 
 
 
 
Cash equivalents
$
610

 
$
133

 
$
477

 
$
—

Short-term investments
25

 
—

 
25

 
—

Derivative financial instruments
7

 
—

 
7

 
—

Deferred compensation plan assets
23

 
23

 
—

 
—

Total
$
665

 
$
156

 
$
509

 
$
—

Liabilities:
 
 
 
 
 
 
 
Derivative financial instruments
$
37

 
$
—

 
$
37

 
$
—