v3.7.0.1
Condensed Consolidated Balance Sheet (Unaudited) (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2017
Dec. 31, 2016
Preferred stock, shares authorized (in shares) 20,000,000 20,000,000
Preferred stock, shares issued (in shares) 0 0
Accumulated depreciation $ 49,991 $ 49,694
Accumulated amortization 11,442 11,013
NBCUniversal Media LLC [Member]    
Accumulated depreciation 3,567 3,350
Accumulated amortization $ 6,854 $ 6,568
Class A Common Stock [Member]    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 7,500,000,000 7,500,000,000
Common stock, shares issued (in shares) 5,606,303,522 5,614,950,039
Common stock, shares outstanding (in shares) 4,733,512,494 4,742,159,011
Treasury stock (in shares) 872,791,028 872,791,028
Class B Common Stock [Member]    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 75,000,000 75,000,000
Common stock, shares issued (in shares) 9,444,375 9,444,375
Common stock, shares outstanding (in shares) 9,444,375 9,444,375