v2.4.1.9
Schedule II Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2014
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Comcast Corporation and Subsidiaries
Schedule II — Valuation and Qualifying Accounts
Year ended December 31, 2014, 2013 and 2012
Year Ended December 31 (in millions)Balance at Beginning of YearAdditions Charged to Costs and Expenses(a)Deductions from Reserves(a)Balance at End of Year
2014
Allowance for doubtful accounts$ 221 $ 162 $ 178 $ 205
Allowance for returns and customer incentives 375 932 948 359
Valuation allowance on deferred tax assets 405 33 63 375
2013
Allowance for doubtful accounts$ 198 $317 $294 $ 221
Allowance for returns and customer incentives 307 811 743 375
Valuation allowance on deferred tax assets 355 71 21 405
2012
Allowance for doubtful accounts$ 202 $293$297$ 198
Allowance for returns and customer incentives 425 663 781 307
Valuation allowance on deferred tax assets 297 61 3 355

(a) Additions and deductions related to allowance for returns and customer incentives include amounts for distribution on behalf of third parties. Additions and deductions related to allowance for returns and customer incentives for the years ended December 31, 2013 and 2012 also reflect corrections to change amounts that were previously recorded net.
NBCUniversal Media, LLC [Member]  
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
NBCUniversal Media, LLC
Schedule II — Valuation and Qualifying Accounts
Year ended December 31, 2014, 2013 and 2012
Year Ended December 31 (in millions)Balance at Beginning of YearAdditions Charged to Costs and Expenses(a)Deductions from Reserves(a)Balance at End of Year
2014
Allowance for doubtful accounts$ 65 $ 11 $ 16 $ 60
Allowance for returns and customer incentives 372 930 946 356
Valuation allowance on deferred tax assets 60 33 6 87
2013
Allowance for doubtful accounts$ 46 $33 $14 $ 65
Allowance for returns and customer incentives 307 808 743 372
Valuation allowance on deferred tax assets 73 8 21 60
2012
Allowance for doubtful accounts$ 34 $19$7$ 46
Allowance for returns and customer incentives 425 663 781 307
Valuation allowance on deferred tax assets 53 23 3 73

(a) Additions and deductions related to allowance for returns and customer incentives include amounts for distribution on behalf of third parties. Additions and deductions related to allowance for returns and customer incentives for the years ended December 31, 2013 and 2012 also reflect corrections to change amounts that were previously recorded net.