v3.3.0.814
Supplemental Financial Information (Receivables)(Details) - USD ($)
$ in Millions
Sep. 30, 2015
Dec. 31, 2014
Receivables, gross $ 7,052 $ 6,885
Less: Allowance for returns and customer incentives 289 359
Less: Allowance for doubtful accounts 236 205
Receivables, net 6,527 6,321
NBCUniversal Media, LLC [Member]    
Receivables, gross 5,417 5,258
Less: Allowance for returns and customer incentives 286 356
Less: Allowance for doubtful accounts 75 60
Receivables, net $ 5,056 $ 4,842