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Property, Plant and Equipment, net - Additional Information (Details) (Detail)
R$ in Thousands, $ in Thousands, $ in Thousands
 12 Months Ended
Oct. 20, 2017
MXN ($)
Transponder
Dec. 31, 2018
MXN ($)
Dec. 31, 2018
BRL (R$)
Dec. 31, 2017
MXN ($)
Dec. 31, 2017
BRL (R$)
Oct. 20, 2017
USD ($)
Disclosure of detailed information about property, plant and equipment [line items]            
Methods used to determine stage of completion of construction in progress   The completion period of construction in progress is variable and depends upon the type of plant and equipment under construction.        
Estimated useful life of property, plant and equipment decription   Seven years        
Estimated useful life of property, plant and equipment   7        
Property, plant and equipment [member]            
Disclosure of detailed information about property, plant and equipment [line items]            
Capitalized interest amortization period   7        
Star One D2 satellite [member] | Star one [member]            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment, investment capitalized   $ 2,896,399 R$ 551,528 $ 916,240 R$ 153,179  
Star One D2 satellite [member] | Star one [member] | Space Systems Loral [member]            
Disclosure of detailed information about property, plant and equipment [line items]            
Number of transponders | Transponder 52          
Network Capacity 20          
Estimated cost of project $ 6,391,104         $ 323,000
Land and buildings and other equipment [member] | Claro Brasil [member]            
Disclosure of detailed information about property, plant and equipment [line items]            
Property, plant and equipment, pledged in guarantee of legal proceedings | $   $ 3,166,882   $ 3,521,082