v2.4.0.6
Condensed Consolidating Financial Information (Condensed Consolidating Balance Sheet) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Dec. 31, 2010
Cash and cash equivalents $ 2,101 $ 1,620 $ 1,997 $ 5,984
Investments [Current] 2,231 54    
Receivables, net 4,387 4,351    
Programming rights 1,114 987    
Other current assets 1,521 1,561    
Total current assets 11,354 8,573    
Film and television costs 5,120 5,227    
Investments 8,018 9,854    
Investments in and amounts due from subsidiaries eliminated upon consolidation 0 0    
Property and equipment, net 26,891 27,559    
Franchise rights 59,364 59,376    
Goodwill 27,010 26,874    
Other intangible assets, net 17,786 18,165    
Other noncurrent assets, net 2,145 2,190    
Total assets 157,688 157,818    
Accounts payable and accrued expenses related to trade creditors 5,730 5,705    
Accrued participations and residuals 1,300 1,255    
Current portion of long-term debt 2,954 1,367    
Total current liabilities 15,742 13,241    
Long-term debt, less current portion 34,175 37,942    
Deferred income taxes 29,881 29,932    
Other noncurrent liabilities 13,432 13,034    
Redeemable noncontrolling interests 16,279 16,014    
Common stock 31 32    
Total Comcast Corporation shareholders' equity 47,731 47,274    
Noncontrolling interests 448 381    
Total equity 48,179 47,655 46,905 44,434
Total liabilities and equity 157,688 157,818    
Comcast [Member]
        
Cash and cash equivalents 0 0 0 0
Receivables, net 0 0    
Programming rights 0 0    
Other current assets 282 235    
Total current assets 282 235    
Film and television costs 0 0    
Investments 0 0    
Investments in and amounts due from subsidiaries eliminated upon consolidation 70,576 71,222    
Property and equipment, net 253 262    
Franchise rights 0 0    
Goodwill 0 0    
Other intangible assets, net 11 9    
Other noncurrent assets, net 1,113 912    
Total assets 72,235 72,640    
Accounts payable and accrued expenses related to trade creditors 15 10    
Accrued participations and residuals 0 0    
Accrued expenses and other current liabilities 1,283 1,030    
Current portion of long-term debt 601 26    
Total current liabilities 1,899 1,066    
Long-term debt, less current portion 20,752 22,451    
Deferred income taxes 0 0    
Other noncurrent liabilities 1,853 1,849    
Redeemable noncontrolling interests 0 0    
Common stock 31 32    
Other shareholders' equity 47,700 47,242    
Total Comcast Corporation shareholders' equity 47,731 47,274    
Noncontrolling interests 0 0    
Total equity 47,731 47,274    
Total liabilities and equity 72,235 72,640    
CCCL Parent [Member]
        
Cash and cash equivalents 0 0 0 0
Receivables, net 0 0    
Programming rights 0 0    
Other current assets 25 8    
Total current assets 25 8    
Film and television costs 0 0    
Investments 0 0    
Investments in and amounts due from subsidiaries eliminated upon consolidation 93,134 89,568    
Property and equipment, net 0 0    
Franchise rights 0 0    
Goodwill 0 0    
Other intangible assets, net 0 0    
Other noncurrent assets, net 2 30    
Total assets 93,161 89,606    
Accounts payable and accrued expenses related to trade creditors 0 0    
Accrued participations and residuals 0 0    
Accrued expenses and other current liabilities 189 189    
Current portion of long-term debt 2,117 0    
Total current liabilities 2,306 189    
Long-term debt, less current portion 1,826 3,953    
Deferred income taxes 0 0    
Other noncurrent liabilities 0 0    
Redeemable noncontrolling interests 0 0    
Common stock 0 0    
Other shareholders' equity 89,029 85,464    
Total Comcast Corporation shareholders' equity 89,029 85,464    
Noncontrolling interests 0 0    
Total equity 89,029 85,464    
Total liabilities and equity 93,161 89,606    
Combined CCHMO Parents [Member]
        
Cash and cash equivalents 0 0 0 0
Receivables, net 0 0    
Programming rights 0 0    
Other current assets 2 3    
Total current assets 2 3    
Film and television costs 0 0    
Investments 0 0    
Investments in and amounts due from subsidiaries eliminated upon consolidation 47,455 45,725    
Property and equipment, net 0 0    
Franchise rights 0 0    
Goodwill 0 0    
Other intangible assets, net 0 0    
Other noncurrent assets, net 4 5    
Total assets 47,461 45,733    
Accounts payable and accrued expenses related to trade creditors 0 0    
Accrued participations and residuals 0 0    
Accrued expenses and other current liabilities 54 77    
Current portion of long-term debt 0 554    
Total current liabilities 54 631    
Long-term debt, less current portion 1,759 1,764    
Deferred income taxes 0 0    
Other noncurrent liabilities 0 0    
Redeemable noncontrolling interests 0 0    
Common stock 0 0    
Other shareholders' equity 45,648 43,338    
Total Comcast Corporation shareholders' equity 45,648 43,338    
Noncontrolling interests 0 0    
Total equity 45,648 43,338    
Total liabilities and equity 47,461 45,733    
Comcast Holdings [Member]
        
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 84,072 88,336    
Property and equipment, net 0 0    
Franchise rights 0 0    
Goodwill 0 0    
Other intangible assets, net 0 0    
Other noncurrent assets, net 147 148    
Total assets 84,219 88,484    
Accounts payable and accrued expenses related to trade creditors 0 0    
Accrued participations and residuals 0 0    
Accrued expenses and other current liabilities 285 272    
Current portion of long-term debt 202 202    
Total current liabilities 487 474    
Long-term debt, less current portion 113 111    
Deferred income taxes 740 727    
Other noncurrent liabilities 0 0    
Redeemable noncontrolling interests 0 0    
Common stock 0 0    
Other shareholders' equity 82,879 87,172    
Total Comcast Corporation shareholders' equity 82,879 87,172    
Noncontrolling interests 0 0    
Total equity 82,879 87,172    
Total liabilities and equity 84,219 88,484    
Comcast Non-Guarantor Subsidiaries [Member]
        
Cash and cash equivalents 2,101 1,620 1,997 5,984
Investments [Current] 2,231 54    
Receivables, net 4,387 4,351    
Programming rights 1,114 987    
Other current assets 1,212 1,315    
Total current assets 11,045 8,327    
Film and television costs 5,120 5,227    
Investments 8,018 9,854    
Investments in and amounts due from subsidiaries eliminated upon consolidation 43,272 36,949    
Property and equipment, net 26,638 27,297    
Franchise rights 59,364 59,376    
Goodwill 27,010 26,874    
Other intangible assets, net 17,775 18,156    
Other noncurrent assets, net 1,771 1,761    
Total assets 200,013 193,821    
Accounts payable and accrued expenses related to trade creditors 5,715 5,695    
Accrued participations and residuals 1,300 1,255    
Accrued expenses and other current liabilities 3,947 3,346    
Current portion of long-term debt 34 585    
Total current liabilities 10,996 10,881    
Long-term debt, less current portion 9,725 9,663    
Deferred income taxes 29,890 29,728    
Other noncurrent liabilities 11,722 11,328    
Redeemable noncontrolling interests 16,279 16,014    
Common stock 0 0    
Other shareholders' equity 120,953 115,826    
Total Comcast Corporation shareholders' equity 120,953 115,826    
Noncontrolling interests 448 381    
Total equity 121,401 116,207    
Total liabilities and equity 200,013 193,821    
Elimination and Consolidation Adjustments [Member]
        
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 (338,509) (331,800)    
Property and equipment, net 0 0    
Franchise rights 0 0    
Goodwill 0 0    
Other intangible assets, net 0 0    
Other noncurrent assets, net (892) (666)    
Total assets (339,401) (332,466)    
Accounts payable and accrued expenses related to trade creditors 0 0    
Accrued participations and residuals 0 0    
Accrued expenses and other current liabilities 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 (749) (523)    
Other noncurrent liabilities (143) (143)    
Redeemable noncontrolling interests 0 0    
Common stock 0 0    
Other shareholders' equity (338,509) (331,800)    
Total Comcast Corporation shareholders' equity (338,509) (331,800)    
Noncontrolling interests 0 0    
Total equity (338,509) (331,800)    
Total liabilities and equity $ (339,401) $ (332,466)