XML 218 R86.htm IDEA: XBRL DOCUMENT v3.20.1
Basis of Preparation and Summary of Significant Accounting Policies - Disclosure of Estimated Useful Lives for the Current and Comparative (Detail)
 12 Months Ended
Dec. 31, 2019
Bottom of range [member] | Building [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 21 years
Bottom of range [member] | Mobile network infrastructure [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 4 years
Bottom of range [member] | Fixed network infrastructure [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 3 years
Bottom of range [member] | Call center equipment [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 4 years
Bottom of range [member] | Equipment, fixtures and fittings [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 2 years
Bottom of range [member] | Motor vehicles [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 4 years
Bottom of range [member] | Leasehold improvements [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 3 years
Top of range [member] | Building [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 25 years
Top of range [member] | Mobile network infrastructure [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 20 years
Top of range [member] | Fixed network infrastructure [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 25 years
Top of range [member] | Call center equipment [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 8 years
Top of range [member] | Equipment, fixtures and fittings [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 10 years
Top of range [member] | Motor vehicles [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 6 years
Top of range [member] | Leasehold improvements [member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Estimated useful lives Useful lives of property, plant and equipment 5 years