v3.3.1.900
Goodwill and Other Intangible Assets (Amortization of Intangible Assets) (Details)
$ in Millions
Dec. 31, 2015
USD ($)
Future amortization expense, 2016 $ 1,785
Future amortization expense, 2017 1,612
Future amortization expense, 2018 1,365
Future amortization expense, 2019 1,039
Future amortization expense, 2020 902
NBCUniversal Media LLC [Member]  
Future amortization expense, 2016 812
Future amortization expense, 2017 789
Future amortization expense, 2018 776
Future amortization expense, 2019 777
Future amortization expense, 2020 $ 781