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Long-term assets - E.2.2. Movements in tangible assets (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net $ 3,382 [1] $ 2,755
Change in Scope (see note A.1.2.)   727
Additions 823 787
Impairments/reversal of impairment, net 0 (4)
Disposals, net (29) (14)
Depreciation charge (840) (739)
Asset retirement obligations 18 32
Transfers (21) (28)
Transfers from/(to) assets held for sale (166)  
Exchange rate movements (178) (133)
Closing balance, net 2,989 3,382 [1]
Cost or valuation    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net 9,683  
Closing balance, net 9,183 9,683
Accumulated amortization and impairment    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net (6,301)  
Closing balance, net (6,194) (6,301)
Networks (including civil works)    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net 2,691 2,175
Change in Scope (see note A.1.2.)   657
Additions 157 30
Impairments/reversal of impairment, net 0 0
Disposals, net (16) (10)
Depreciation charge (791) (651)
Asset retirement obligations 17 31
Transfers 577 572
Transfers from/(to) assets held for sale (141)  
Exchange rate movements (153) (114)
Closing balance, net 2,340 2,691
Networks (including civil works) | Cost or valuation    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net 8,512  
Closing balance, net 8,071 8,512
Networks (including civil works) | Accumulated amortization and impairment    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net (5,821)  
Closing balance, net (5,731) (5,821)
Land and Buildings    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net 200 185
Change in Scope (see note A.1.2.)   35
Additions 3 0
Impairments/reversal of impairment, net 0 0
Disposals, net (5) 0
Depreciation charge (21) (16)
Asset retirement obligations 0 1
Transfers 22 5
Transfers from/(to) assets held for sale (6)  
Exchange rate movements (12) (10)
Closing balance, net 180 200
Land and Buildings | Cost or valuation    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net 358  
Closing balance, net 348 358
Land and Buildings | Accumulated amortization and impairment    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net (158)  
Closing balance, net (168) (158)
Construction in Progress    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net 428 308
Change in Scope (see note A.1.2.)   29
Additions 655 752
Impairments/reversal of impairment, net 0 (3)
Disposals, net (8) (4)
Depreciation charge 0 0
Asset retirement obligations 0 0
Transfers (632) (646)
Transfers from/(to) assets held for sale (13)  
Exchange rate movements (11) (7)
Closing balance, net 418 428
Construction in Progress | Cost or valuation    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net 428  
Closing balance, net 418 428
Construction in Progress | Accumulated amortization and impairment    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net 0  
Closing balance, net 0 0
Other    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net 63 87
Change in Scope (see note A.1.2.)   6
Additions 9 4
Impairments/reversal of impairment, net 1 (1)
Disposals, net 0 0
Depreciation charge (28) (73)
Asset retirement obligations 0 0
Transfers 12 41
Transfers from/(to) assets held for sale (6)  
Exchange rate movements (2) (2)
Closing balance, net 50 63
Other | Cost or valuation    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net 385  
Closing balance, net 345 385
Other | Accumulated amortization and impairment    
Reconciliation of changes in property, plant and equipment [abstract]    
Opening balance, net (322)  
Closing balance, net $ (296) $ (322)
[1] Restated after the finalization of the Guatemala purchase accounting. See note A.1.2. for further details.