v3.26.1
Property and Equipment - Summary of Estimated Useful Lives of Property and Equipment (Detail)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Cable and wire facilities [Member] | Bottom of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 5 years 5 years
Cable and wire facilities [Member] | Top of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 25 years 15 years
Central equipment [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 10 years  
Central equipment [Member] | Bottom of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets   3 years
Central equipment [Member] | Top of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets   15 years
Network facilities [Member] | Bottom of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 3 years  
Network facilities [Member] | Top of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 20 years  
Buildings [Member] | Bottom of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 25 years  
Buildings [Member] | Top of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 50 years  
Vehicles, furniture and other network equipment [Member] | Bottom of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 3 years  
Vehicles, furniture and other network equipment [Member] | Top of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 15 years  
Land improvements [Member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 10 years  
IT systems and platforms [Member] | Bottom of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 3 years 3 years
IT systems and platforms [Member] | Top of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 20 years 5 years
Security platforms [Member] | Bottom of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 3 years  
Security platforms [Member] | Top of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 5 years  
Leasehold improvements [Member] | Bottom of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 3 years  
Leasehold improvements [Member] | Top of range [member]    
Disclosure Of Property Plant And Equipment [Line Items]    
Estimated useful lives of assets 10 years