Summary of Significant Accounting Policies - Property, Plant and Equipment Useful Life (Details)	12 Months Ended
	Dec. 31, 2018
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	P40Y
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	P5Y
Machinery, satellite hubs and equipment, and video-on-demand units | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	P10Y
Machinery, satellite hubs and equipment, and video-on-demand units | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	P4Y
Office and computer equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	P7Y
Office and computer equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	P3Y
Motor vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	P5Y