Annual report pursuant to Section 13 and 15(d)

Property and Equipment, Net Property and Equipment, Net (Details)

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Property and Equipment, Net Property and Equipment, Net (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment, Net, by Type [Abstract]    
Property and equipment, gross $ 2,179 $ 2,035
Less: accumulated depreciation (1,174) (1,004)
Property and equipment, net $ 1,005 1,031
Property, Plant and Equipment, Useful Life 20 years  
Property and equipment, disposals $ 40 65
Land    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property and equipment, gross 85 81
Buildings and improvements    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property and equipment, gross 1,100 1,048
Furniture and other equipment    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property and equipment, gross 497 447
Broadcast equipment    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property and equipment, gross 134 135
Computer equipment    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property and equipment, gross 160 146
Transponders and terrestrial transmitter (note 9)    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property and equipment, gross 170 150
Projects in progress    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property and equipment, gross $ 33 $ 28
Minimum | Buildings and improvements    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property, Plant and Equipment, Useful Life 8 years  
Minimum | Furniture and other equipment    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property, Plant and Equipment, Useful Life 2 years  
Minimum | Broadcast equipment    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property, Plant and Equipment, Useful Life 3 years  
Minimum | Computer equipment    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property, Plant and Equipment, Useful Life 2 years  
Minimum | Transponders and terrestrial transmitter (note 9)    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property, Plant and Equipment, Useful Life 8 years  
Maximum | Buildings and improvements    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property, Plant and Equipment, Useful Life 20 years  
Maximum | Furniture and other equipment    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property, Plant and Equipment, Useful Life 8 years  
Maximum | Broadcast equipment    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property, Plant and Equipment, Useful Life 5 years  
Maximum | Computer equipment    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property, Plant and Equipment, Useful Life 4 years  
Maximum | Transponders and terrestrial transmitter (note 9)    
Property, Plant and Equipment, Net, by Type [Abstract]    
Property, Plant and Equipment, Useful Life 15 years