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Document And Entity Information
9 Months Ended
Sep. 30, 2014
Oct. 28, 2014
Series A Common Stock [Member]
Oct. 28, 2014
Series B Common Stock [Member]
Oct. 28, 2014
Series C Common Stock [Member]
Document Type 10-Q      
Amendment Flag false      
Document Period End Date Sep. 30, 2014      
Document Fiscal Year Focus 2014      
Document Fiscal Period Focus Q3      
Entity Registrant Name Discovery Communications, Inc.      
Entity Central Index Key 0001437107      
Current Fiscal Year End Date --12-31      
Entity Filer Category Large Accelerated Filer      
Entity Common Stock, Shares Outstanding   148,491,088 6,542,457 287,302,099