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Intangible Assets Including Goodwill (Details 2) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Future amortization expense, by year  
2012 $ 1,113
2013 840
2014 516
2015 340
2016 303
Capitalized software
 
Future amortization expense, by year  
2012 480
2013 250
2014 70
Acquired intangibles
 
Future amortization expense, by year  
2012 634
2013 590
2014 446
2015 340
2016 $ 303