v3.3.1.900
Supplemental Financial Information (Noncash Investing and Financing Activities)(Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Mar. 19, 2013
Total noncash consideration transferred related to the Redemption Transaction     $ 6,000  
Dividends payable, amount $ 612 $ 572 $ 509  
Dividends payable, amount per share $ 0.25 $ 0.225 $ 0.195  
Capital expenditures incurred but not yet paid $ 1,100 $ 797 $ 872  
Fair Value Equity Securities Settlement 517 3,200 1,400  
NBCUniversal Media LLC [Member]        
Capital expenditures incurred but not yet paid 287 $ 148 306  
Contribution from member $ 252      
Revolving Credit Facility Member        
Consideration transferred related to the Redemption Transaction and purchase of certain properties     1,250  
NBCUniversal Enterprise Senior Debt Securities [Member]        
Consideration transferred related to the Redemption Transaction and purchase of certain properties     4,000  
NBCUniversal Enterprise Preferred Stock [Member]        
Consideration transferred related to the Redemption Transaction and purchase of certain properties     725  
NBCUniversal Redemption Transaction [Member]        
Remaining noncontrolling interest acquired       49.00%
Purchase of NBCUniversal noncontrolling interest     $ 16,700