v2.4.0.6
Document and Entity Information (USD $)
In Billions, except Share data, unless otherwise specified
12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2010
Jun. 30, 2010
Dec. 31, 2010
Series A Common Stock [Member]
Feb. 08, 2011
Series A Common Stock [Member]
Dec. 31, 2010
Series B Common Stock [Member]
Feb. 08, 2011
Series B Common Stock [Member]
Dec. 31, 2010
Series C Common Stock [Member]
Feb. 08, 2011
Series C Common Stock [Member]
Document Type 10-K              
Amendment Flag false              
Document Period End Date Dec. 31, 2010              
Document Fiscal Year Focus 2010              
Document Fiscal Period Focus FY              
Trading Symbol     DISCA   DISCB   DISCK  
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       138,428,061   6,589,084   136,547,310
Entity Current Reporting Status Yes              
Entity Voluntary Filers No              
Entity Well-known Seasoned Issuer Yes              
Entity Public Float   $ 9.0