v3.26.1
SUMMARY OF MATERIAL ACCOUNTING POLICIES (Tables)
12 Months Ended
Dec. 31, 2025
SUMMARY OF MATERIAL ACCOUNTING POLICIES  
Schedule of useful lives of property, plant and equipment

Depreciation is calculated on a straight-line basis over the following estimated useful lives:

Assets

  ​ ​ ​

Estimated useful lives

Buildings and leasehold improvements

 

5 to 40

years

Furniture and equipment

 

3 to 7

years

Telecommunication networks

 

3 to 20

years

Schedule of useful lives of intangible assets

Intangible assets with finite useful lives are amortized over their useful lives using the straight-line method over the following periods:

Assets

  ​ ​ ​

Estimated useful lives

Software

 

3 to 7

years

Customer relationships and other

 

5 to 8

years