v3.5.0.2
Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) - USD ($)
$ in Millions
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2014
Assets        
Cash and cash equivalents $ 4,665 $ 2,295 $ 3,486 $ 3,910
Receivables, net 6,708 6,896    
Programming rights 1,435 1,213    
Other current assets 1,969 1,899    
Total current assets 14,777 12,303    
Film and television costs 5,811 5,855    
Investments 3,679 3,224    
Investments in and amounts due from subsidiaries eliminated upon consolidation 0 0    
Property and equipment, net 34,896 33,665    
Franchise rights 59,364 59,364    
Goodwill 33,792 32,945    
Other intangible assets, net 17,204 16,946    
Other noncurrent assets, net 2,462 2,272    
Total assets 171,985 166,574    
Liabilities and Equity        
Accounts payable and accrued expenses related to trade creditors 6,359 6,215    
Accrued participations and residuals 1,542 1,572    
Accrued expenses and other current liabilities [condensed] 6,766 6,764    
Current portion of long-term debt 2,934 3,627    
Total current liabilities 17,601 18,178    
Long-term debt, less current portion 52,629 48,994    
Deferred income taxes 34,512 33,566    
Other noncurrent liabilities 10,719 10,637    
Redeemable noncontrolling interests and redeemable subsidiary preferred stock 1,248 1,221    
Equity:        
Common stock 28 29    
Other shareholders' equity 53,070 52,240    
Total Comcast Corporation shareholders' equity 53,098 52,269    
Noncontrolling interests 2,178 1,709    
Total equity 55,276 53,978 52,729 53,068
Total liabilities and equity 171,985 166,574    
Comcast Parent [Member]        
Assets        
Cash and cash equivalents 0 0 0 0
Receivables, net 0 0    
Programming rights 0 0    
Other current assets 138 69    
Total current assets 138 69    
Film and television costs 0 0    
Investments 48 33    
Investments in and amounts due from subsidiaries eliminated upon consolidation 91,382 87,142    
Property and equipment, net 218 210    
Franchise rights 0 0    
Goodwill 0 0    
Other intangible assets, net 10 12    
Other noncurrent assets, net 1,361 1,301    
Total assets 93,157 88,767    
Liabilities and Equity        
Accounts payable and accrued expenses related to trade creditors 31 16    
Accrued participations and residuals 0 0    
Accrued expenses and other current liabilities [condensed] 1,672 1,789    
Current portion of long-term debt 1,000 1,149    
Total current liabilities 2,703 2,954    
Long-term debt, less current portion 34,757 31,106    
Deferred income taxes 0 0    
Other noncurrent liabilities 2,599 2,438    
Redeemable noncontrolling interests and redeemable subsidiary preferred stock 0 0    
Equity:        
Common stock 28 29    
Other shareholders' equity 53,070 52,240    
Total Comcast Corporation shareholders' equity 53,098 52,269    
Noncontrolling interests 0 0    
Total equity 53,098 52,269    
Total liabilities and equity 93,157 88,767    
Comcast Holdings [Member]        
Assets        
Cash and cash equivalents 0 0 0 0
Receivables, net 0 0    
Programming rights 0 0    
Other current assets 0 0    
Total current assets 0 0    
Film and television costs 0 0    
Investments 0 0    
Investments in and amounts due from subsidiaries eliminated upon consolidation 115,253 111,241    
Property and equipment, net 0 0    
Franchise rights 0 0    
Goodwill 0 0    
Other intangible assets, net 0 0    
Other noncurrent assets, net 147 147    
Total assets 115,400 111,388    
Liabilities and Equity        
Accounts payable and accrued expenses related to trade creditors 0 0    
Accrued participations and residuals 0 0    
Accrued expenses and other current liabilities [condensed] 335 335    
Current portion of long-term debt 0 0    
Total current liabilities 335 335    
Long-term debt, less current portion 133 130    
Deferred income taxes 581 624    
Other noncurrent liabilities 0 0    
Redeemable noncontrolling interests and redeemable subsidiary preferred stock 0 0    
Equity:        
Common stock 0 0    
Other shareholders' equity 114,351 110,299    
Total Comcast Corporation shareholders' equity 114,351 110,299    
Noncontrolling interests 0 0    
Total equity 114,351 110,299    
Total liabilities and equity 115,400 111,388    
CCCL Parent [Member]        
Assets        
Cash and cash equivalents 0 0 0 0
Receivables, net 0 0    
Programming rights 0 0    
Other current assets 0 0    
Total current assets 0 0    
Film and television costs 0 0    
Investments 0 0    
Investments in and amounts due from subsidiaries eliminated upon consolidation 123,620 119,354    
Property and equipment, net 0 0    
Franchise rights 0 0    
Goodwill 0 0    
Other intangible assets, net 0 0    
Other noncurrent assets, net 0 0    
Total assets 123,620 119,354    
Liabilities and Equity        
Accounts payable and accrued expenses related to trade creditors 0 0    
Accrued participations and residuals 0 0    
Accrued expenses and other current liabilities [condensed] 282 290    
Current portion of long-term debt 550 0    
Total current liabilities 832 290    
Long-term debt, less current portion 2,100 2,650    
Deferred income taxes 0 0    
Other noncurrent liabilities 0 0    
Redeemable noncontrolling interests and redeemable subsidiary preferred stock 0 0    
Equity:        
Common stock 0 0    
Other shareholders' equity 120,688 116,414    
Total Comcast Corporation shareholders' equity 120,688 116,414    
Noncontrolling interests 0 0    
Total equity 120,688 116,414    
Total liabilities and equity 123,620 119,354    
NBCUniversal Media Parent [Member]        
Assets        
Cash and cash equivalents 270 414 299 385
Receivables, net 0 0    
Programming rights 0 0    
Other current assets 49 17    
Total current assets 319 431    
Film and television costs 0 0    
Investments 445 430    
Investments in and amounts due from subsidiaries eliminated upon consolidation 42,893 42,441    
Property and equipment, net 0 0    
Franchise rights 0 0    
Goodwill 0 0    
Other intangible assets, net 0 0    
Other noncurrent assets, net 85 78    
Total assets 43,742 43,380    
Liabilities and Equity        
Accounts payable and accrued expenses related to trade creditors 0 0    
Accrued participations and residuals 0 0    
Accrued expenses and other current liabilities [condensed] 282 389    
Current portion of long-term debt 4 1,005    
Total current liabilities 286 1,394    
Long-term debt, less current portion 8,228 8,211    
Deferred income taxes 69 66    
Other noncurrent liabilities 1,143 1,087    
Redeemable noncontrolling interests and redeemable subsidiary preferred stock 0 0    
Equity:        
Common stock 0 0    
Other shareholders' equity 34,016 32,622    
Total Comcast Corporation shareholders' equity 34,016 32,622    
Noncontrolling interests 0 0    
Total equity 34,016 32,622    
Total liabilities and equity 43,742 43,380    
Comcast Non-Guarantor Subsidiaries [Member]        
Assets        
Cash and cash equivalents 4,395 1,881 3,187 3,525
Receivables, net 6,708 6,896    
Programming rights 1,435 1,213    
Other current assets 1,782 1,813    
Total current assets 14,320 11,803    
Film and television costs 5,811 5,855    
Investments 3,186 2,761    
Investments in and amounts due from subsidiaries eliminated upon consolidation 113,686 109,598    
Property and equipment, net 34,678 33,455    
Franchise rights 59,364 59,364    
Goodwill 33,792 32,945    
Other intangible assets, net 17,194 16,934    
Other noncurrent assets, net 2,117 2,114    
Total assets 284,148 274,829    
Liabilities and Equity        
Accounts payable and accrued expenses related to trade creditors 6,328 6,199    
Accrued participations and residuals 1,542 1,572    
Accrued expenses and other current liabilities [condensed] 4,195 3,961    
Current portion of long-term debt 1,380 1,473    
Total current liabilities 13,445 13,205    
Long-term debt, less current portion 7,411 6,897    
Deferred income taxes 34,964 34,098    
Other noncurrent liabilities 7,123 7,258    
Redeemable noncontrolling interests and redeemable subsidiary preferred stock 1,248 1,221    
Equity:        
Common stock 0 0    
Other shareholders' equity 217,779 210,441    
Total Comcast Corporation shareholders' equity 217,779 210,441    
Noncontrolling interests 2,178 1,709    
Total equity 219,957 212,150    
Total liabilities and equity 284,148 274,829    
Elimination and Consolidation Adjustments [Member]        
Assets        
Cash and cash equivalents 0 0 $ 0 $ 0
Receivables, net 0 0    
Programming rights 0 0    
Other current assets 0 0    
Total current assets 0 0    
Film and television costs 0 0    
Investments 0 0    
Investments in and amounts due from subsidiaries eliminated upon consolidation (486,834) (469,776)    
Property and equipment, net 0 0    
Franchise rights 0 0    
Goodwill 0 0    
Other intangible assets, net 0 0    
Other noncurrent assets, net (1,248) (1,368)    
Total assets (488,082) (471,144)    
Liabilities and Equity        
Accounts payable and accrued expenses related to trade creditors 0 0    
Accrued participations and residuals 0 0    
Accrued expenses and other current liabilities [condensed] 0 0    
Current portion of long-term debt 0 0    
Total current liabilities 0 0    
Long-term debt, less current portion 0 0    
Deferred income taxes (1,102) (1,222)    
Other noncurrent liabilities (146) (146)    
Redeemable noncontrolling interests and redeemable subsidiary preferred stock 0 0    
Equity:        
Common stock 0 0    
Other shareholders' equity (486,834) (469,776)    
Total Comcast Corporation shareholders' equity (486,834) (469,776)    
Noncontrolling interests 0 0    
Total equity (486,834) (469,776)    
Total liabilities and equity $ (488,082) $ (471,144)