v2.4.0.8
Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2013
Dec. 31, 2012
Cash and cash equivalents $ 1,529 $ 1,718 $ 1,389 $ 10,951
Investments [Current] 2,325 3,573    
Receivables, net 6,232 6,376    
Programming rights 905 928    
Other current assets 1,781 1,480    
Total current assets 12,772 14,075    
Film and television costs 5,208 4,994    
Investments 3,072 3,770    
Property and equipment, net 29,970 29,840    
Franchise rights 59,364 59,364    
Goodwill 27,323 27,098    
Other intangible assets, net 17,233 17,329    
Other noncurrent assets, net 2,517 2,343    
Total assets 157,459 158,813    
Accounts payable and accrued expenses related to trade creditors 5,432 5,528    
Accrued participations and residuals 1,364 1,239    
Accrued expenses and other current liabilities [condensed] 7,632 8,865    
Current portion of long-term debt 2,947 3,280    
Total current liabilities 17,375 18,912    
Long-term debt, less current portion 43,602 44,567    
Deferred income taxes 31,854 31,935    
Other noncurrent liabilities 11,241 11,384    
Redeemable noncontrolling interests and redeemable subsidiary preferred stock 1,055 957    
Common stock 30 30    
Other shareholders' equity 51,941 50,664    
Total Comcast Corporation shareholders' equity 51,971 50,694    
Noncontrolling interests 361 364    
Total equity 52,332 51,058 49,486 49,796
Total liabilities and equity 157,459 158,813    
Comcast [Member]
        
Other current assets 227 237    
Total current assets 227 237    
Investments 21 11    
Investments in and amounts due from subsidiaries eliminated upon consolidation 81,329 79,956    
Property and equipment, net 209 220    
Other intangible assets, net 10 11    
Other noncurrent assets, net 1,179 1,078    
Total assets 82,975 81,513    
Accounts payable and accrued expenses related to trade creditors 11 8    
Accrued expenses and other current liabilities [condensed] 1,501 1,371    
Current portion of long-term debt 900 2,351    
Total current liabilities 2,412 3,730    
Long-term debt, less current portion 26,489 25,170    
Other noncurrent liabilities 2,103 1,919    
Common stock 30 30    
Other shareholders' equity 51,941 50,664    
Total Comcast Corporation shareholders' equity 51,971 50,694    
Total equity 51,971 50,694    
Total liabilities and equity 82,975 81,513    
Comcast Holdings [Member]
        
Investments in and amounts due from subsidiaries eliminated upon consolidation 100,649 97,429    
Other noncurrent assets, net 148 145    
Total assets 100,797 97,574    
Accrued expenses and other current liabilities [condensed] 283 266    
Total current liabilities 283 266    
Long-term debt, less current portion 132 132    
Deferred income taxes 738 777    
Other shareholders' equity 99,644 96,399    
Total Comcast Corporation shareholders' equity 99,644 96,399    
Total equity 99,644 96,399    
Total liabilities and equity 100,797 97,574    
CCCL Parent [Member]
        
Investments in and amounts due from subsidiaries eliminated upon consolidation 107,347 102,673    
Total assets 107,347 102,673    
Accrued expenses and other current liabilities [condensed] 193 180    
Total current liabilities 193 180    
Long-term debt, less current portion 1,827 1,827    
Other shareholders' equity 105,327 100,666    
Total Comcast Corporation shareholders' equity 105,327 100,666    
Total equity 105,327 100,666    
Total liabilities and equity 107,347 102,673    
Combined CCHMO Parents [Member]
        
Investments in and amounts due from subsidiaries eliminated upon consolidation 57,057 54,724    
Total assets 57,057 54,724    
Accrued expenses and other current liabilities [condensed] 47 47    
Total current liabilities 47 47    
Long-term debt, less current portion 1,502 1,505    
Other shareholders' equity 55,508 53,172    
Total Comcast Corporation shareholders' equity 55,508 53,172    
Total equity 55,508 53,172    
Total liabilities and equity 57,057 54,724    
NBCUniversal Media Parent [Member]
        
Cash and cash equivalents 307 336 351 5,129
Investments [Current] 8      
Other current assets 35 35    
Total current assets 350 371    
Investments 374 374    
Investments in and amounts due from subsidiaries eliminated upon consolidation 40,511 40,644    
Other noncurrent assets, net 97 103    
Total assets 41,332 41,492    
Accrued expenses and other current liabilities [condensed] 322 323    
Current portion of long-term debt 1,011 903    
Total current liabilities 1,333 1,226    
Long-term debt, less current portion 9,220 10,236    
Deferred income taxes 59 59    
Other noncurrent liabilities 981 931    
Other shareholders' equity 29,739 29,040    
Total Comcast Corporation shareholders' equity 29,739 29,040    
Total equity 29,739 29,040    
Total liabilities and equity 41,332 41,492    
Comcast Non-Guarantor Subsidiaries [Member]
        
Cash and cash equivalents 1,222 1,382 1,038 5,822
Investments [Current] 2,317 3,573    
Receivables, net 6,232 6,376    
Programming rights 905 928    
Other current assets 1,519 1,208    
Total current assets 12,195 13,467    
Film and television costs 5,208 4,994    
Investments 2,677 3,385    
Investments in and amounts due from subsidiaries eliminated upon consolidation 91,705 85,164    
Property and equipment, net 29,761 29,620    
Franchise rights 59,364 59,364    
Goodwill 27,323 27,098    
Other intangible assets, net 17,223 17,318    
Other noncurrent assets, net 2,065 1,899    
Total assets 247,521 242,309    
Accounts payable and accrued expenses related to trade creditors 5,421 5,520    
Accrued participations and residuals 1,364 1,239    
Accrued expenses and other current liabilities [condensed] 5,286 6,678    
Current portion of long-term debt 1,036 26    
Total current liabilities 13,107 13,463    
Long-term debt, less current portion 4,432 5,697    
Deferred income taxes 31,885 31,840    
Other noncurrent liabilities 8,301 8,675    
Redeemable noncontrolling interests and redeemable subsidiary preferred stock 1,055 957    
Other shareholders' equity 188,380 181,313    
Total Comcast Corporation shareholders' equity 188,380 181,313    
Noncontrolling interests 361 364    
Total equity 188,741 181,677    
Total liabilities and equity 247,521 242,309    
Elimination and Consolidation Adjustments [Member]
        
Investments in and amounts due from subsidiaries eliminated upon consolidation (478,598) (460,590)    
Other noncurrent assets, net (972) (882)    
Total assets (479,570) (461,472)    
Deferred income taxes (828) (741)    
Other noncurrent liabilities (144) (141)    
Other shareholders' equity (478,598) (460,590)    
Total Comcast Corporation shareholders' equity (478,598) (460,590)    
Total equity (478,598) (460,590)    
Total liabilities and equity $ (479,570) $ (461,472)