v2.4.0.8
Film and Television Costs (Film and Television Costs)(Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Film And Television Costs [Line Items]    
Programming rights, less amortization $ 2,271 $ 2,039
Total film costs, television costs and programming rights 6,552 5,922
Less: Current portion of programming rights 992 928
Film and television costs 5,560 4,994
NBCUniversal Media, LLC [Member]
    
Film And Television Costs [Line Items]    
Programming rights, less amortization 2,247 2,003
Total film costs, television costs and programming rights 6,528 5,886
Less: Current portion of programming rights 976 903
Film and television costs 5,552 4,983
Film Costs [Member]
    
Film And Television Costs [Line Items]    
Released, less amortization 1,313 1,630
Completed, not released 193 70
In production and in development 1,143 658
Total film costs 2,649 2,358
Film Costs [Member] | NBCUniversal Media, LLC [Member]
    
Film And Television Costs [Line Items]    
Released, less amortization 1,313 1,630
Completed, not released 193 70
In production and in development 1,143 658
Total film costs 2,649 2,358
Television Costs [Member]
    
Film And Television Costs [Line Items]    
Released, less amortization 1,187 1,155
In production and in development 445 370
Total television costs 1,632 1,525
Television Costs [Member] | NBCUniversal Media, LLC [Member]
    
Film And Television Costs [Line Items]    
Released, less amortization 1,187 1,155
In production and in development 445 370
Total television costs $ 1,632 $ 1,525