v2.4.0.8
Film and Television Costs (Film and Television Costs)(Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Film And Television Costs [Line Items]    
Programming rights, less amortization $ 2,089 $ 2,039
Total film costs, television costs and programming rights 6,113 5,922
Less: Current portion of programming rights 905 928
Film and television costs 5,208 4,994
NBCUniversal Media, LLC [Member]
    
Film And Television Costs [Line Items]    
Programming rights, less amortization 2,065 2,003
Total film costs, television costs and programming rights 6,089 5,886
Less: Current portion of programming rights 889 903
Film and television costs 5,200 4,983
Film Costs [Member]
    
Film And Television Costs [Line Items]    
Released, less amortization 1,356 1,630
Completed, not released 65 70
In production and in development 1,077 658
Total film costs 2,498 2,358
Film Costs [Member] | NBCUniversal Media, LLC [Member]
    
Film And Television Costs [Line Items]    
Released, less amortization 1,356 1,630
Completed, not released 65 70
In production and in development 1,077 658
Total film costs 2,498 2,358
Television Costs [Member]
    
Film And Television Costs [Line Items]    
Released, less amortization 1,165 1,155
In production and in development 361 370
Total television costs 1,526 1,525
Television Costs [Member] | NBCUniversal Media, LLC [Member]
    
Film And Television Costs [Line Items]    
Released, less amortization 1,165 1,155
In production and in development 361 370
Total television costs $ 1,526 $ 1,525