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Additional Information
 12 Months Ended
Dec. 31, 2012
Additional Information [Abstract]  
Additional Information
Additional Information:
 
For the Years Ended December 31,
(in millions)
2012
 
2011
 
2010
Research and development expense
$
415

 
$
413

 
$
391

Advertising expense
$
483

 
$
464

 
$
402

Interest expense
$
1,007

 
$
934

 
$
974

Interest income
(148
)
 
(134
)
 
(98
)
Interest expense, net
$
859

 
$
800

 
$
876

Rent expense
$
318

 
$
308

 
$
278


Minimum rental commitments under non-cancelable operating leases in effect at December 31, 2012, were as follows:
 
(in millions)
 
2013
$
218

2014
157

2015
104

2016
80

2017
66

Thereafter
226

 
$
851