v2.4.0.8
Goodwill and Other Intangible Assets (Amortization of Intangible Assets) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Future amortization expense, 2014 $ 1,487
Future amortization expense, 2015 1,345
Future amortization expense, 2016 1,196
Future amortization expense, 2017 1,046
Future amortization expense, 2018 893
NBCUniversal Media, LLC [Member]
  
Future amortization expense, 2014 771
Future amortization expense, 2015 762
Future amortization expense, 2016 739
Future amortization expense, 2017 740
Future amortization expense, 2018 $ 734