v3.26.1
PROPERTY AND EQUIPMENT - Schedule Of Property And Equipment, Including Right-Of-Use Assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Property, plant and equipment including right-of-use assets at beginning of period $ 624 [1] $ 597
Additions 292 184
Modifications and reassessments 92 53
Disposals (4) (4)
Depreciation charge for the year (140) (118)
Divestment and reclassification as held for sale   (1)
Impairment (9) (4)
Impairment reversal 1 1
Transfer and reclassification 0 (24)
Translation adjustment (7) (60)
Property, plant and equipment including right-of-use assets at end of period 849 624 [1]
Property, plant and equipment | Telecomm-unications equipment    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Property, plant and equipment including right-of-use assets at beginning of period 311 288
Additions 5 1
Modifications and reassessments 0 0
Disposals (1) (1)
Depreciation charge for the year (78) (65)
Divestment and reclassification as held for sale   (1)
Impairment (7) (3)
Impairment reversal 0 0
Transfer and reclassification 226 119
Translation adjustment (4) (27)
Property, plant and equipment including right-of-use assets at end of period 452 311
Property, plant and equipment | Land, buildings and constructions    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Property, plant and equipment including right-of-use assets at beginning of period 25 28
Additions 0 0
Modifications and reassessments 0 0
Disposals 0 0
Depreciation charge for the year (3) (3)
Divestment and reclassification as held for sale   0
Impairment 0 0
Impairment reversal 0 0
Transfer and reclassification 7 3
Translation adjustment 0 (3)
Property, plant and equipment including right-of-use assets at end of period 29 25
Property, plant and equipment | Office and other equipment    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Property, plant and equipment including right-of-use assets at beginning of period 19 20
Additions 1 0
Modifications and reassessments 0 0
Disposals 0 0
Depreciation charge for the year (6) (5)
Divestment and reclassification as held for sale   0
Impairment 0 0
Impairment reversal 0 0
Transfer and reclassification 9 7
Translation adjustment 0 (3)
Property, plant and equipment including right-of-use assets at end of period 23 19
Property, plant and equipment | Equipment not installed and assets under construction    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Property, plant and equipment including right-of-use assets at beginning of period 31 26
Additions 257 161
Modifications and reassessments 0 0
Disposals 0 0
Depreciation charge for the year 0 0
Divestment and reclassification as held for sale   0
Impairment (1) (1)
Impairment reversal 1 1
Transfer and reclassification (242) (153)
Translation adjustment (1) (3)
Property, plant and equipment including right-of-use assets at end of period 45 31
Right-of-use assets    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Property, plant and equipment including right-of-use assets at beginning of period 238 235
Additions 29 22
Modifications and reassessments 92 53
Disposals (3) (3)
Depreciation charge for the year (53) (45)
Divestment and reclassification as held for sale   0
Impairment (1) 0
Impairment reversal 0 0
Transfer and reclassification 0 0
Translation adjustment (2) (24)
Property, plant and equipment including right-of-use assets at end of period $ 300 $ 238
[1]
*Prior period comparatives have been reclassified to conform with the current period presentation