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Property, Plant and Equipment - Estimated Service Lives of Property, Plant and Equipment - Asset Used by The Company (Detail) - Assets Used by the Company [Member]
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Land improvements [Member] | Bottom of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 10 years 10 years
Land improvements [Member] | Top of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 30 years 30 years
Main buildings [Member] | Bottom of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 20 years 20 years
Main buildings [Member] | Top of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 60 years 60 years
Other building facilities [Member] | Bottom of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 3 years 3 years
Other building facilities [Member] | Top of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 15 years 15 years
Computer equipment [Member] | Bottom of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 2 years 2 years
Computer equipment [Member] | Top of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 8 years 8 years
Telecommunication circuits [Member] | Bottom of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 2 years 2 years
Telecommunication circuits [Member] | Top of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 30 years 30 years
Telecommunication machinery and antennas equipment [Member] | Bottom of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 2 years 2 years
Telecommunication machinery and antennas equipment [Member] | Top of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 30 years 30 years
Transportation equipment [Member] | Bottom of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 2 years 2 years
Transportation equipment [Member] | Top of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 10 years 10 years
Leasehold improvements [Member] | Bottom of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 1 years 1 years
Leasehold improvements [Member] | Top of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 18 years 18 years
Mechanical and air conditioner equipment [Member] | Bottom of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 3 years 3 years
Mechanical and air conditioner equipment [Member] | Top of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 16 years 16 years
Others [Member] | Bottom of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 1 years 1 years
Others [Member] | Top of Range [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated service lives 15 years 15 years