v3.26.1
Property, plant, and equipment (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
IfrsStatementLineItems [Line Items]    
Balance at beginning of year $ 43,625 $ 39,984
Additions (i) 2,424 2,206
Interest capitalization 10 12
Disposals (69) (226)
Asset retirement and environmental compensation obligations 72 37
Depreciation, depletion and amortization (1,510) (1,377)
Translation adjustment 1,847 4,488
Balance at end of year 46,399 44,293
Transfer to asset held for sale   (831)
Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Property, plant and equipment, cost 87,077 78,093
Accumulated depreciation, amortisation and impairment [member]    
IfrsStatementLineItems [Line Items]    
Accumulated depreciation (40,678) (33,800)
Land [member]    
IfrsStatementLineItems [Line Items]    
Balance at beginning of year 659 590
Disposals   (1)
Translation adjustment 31 68
Transfers 40 22
Balance at end of year 730 655
Transfer to asset held for sale   (24)
Land [member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Property, plant and equipment, cost 730 655
Building And Facilities [Member]    
IfrsStatementLineItems [Line Items]    
Balance at beginning of year 18,320 16,150
Disposals (16) (26)
Depreciation, depletion and amortization (561) (518)
Translation adjustment 923 1,944
Transfers 880 1,215
Balance at end of year 19,546 18,459
Transfer to asset held for sale   (306)
Building And Facilities [Member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Property, plant and equipment, cost 35,294 31,825
Building And Facilities [Member] | Accumulated depreciation, amortisation and impairment [member]    
IfrsStatementLineItems [Line Items]    
Accumulated depreciation (15,748) (13,366)
Machinery [member]    
IfrsStatementLineItems [Line Items]    
Balance at beginning of year 4,542 4,038
Disposals (4) (3)
Depreciation, depletion and amortization (340) (302)
Translation adjustment 158 395
Transfers 538 763
Balance at end of year 4,894 4,533
Transfer to asset held for sale   (358)
Machinery [member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Property, plant and equipment, cost 12,186 10,798
Machinery [member] | Accumulated depreciation, amortisation and impairment [member]    
IfrsStatementLineItems [Line Items]    
Accumulated depreciation (7,292) (6,265)
Tangible exploration and evaluation assets [member]    
IfrsStatementLineItems [Line Items]    
Balance at beginning of year 4,267 4,547
Disposals   (7)
Asset retirement and environmental compensation obligations 72 37
Depreciation, depletion and amortization (215) (218)
Translation adjustment 41 400
Transfers 1,338 (805)
Balance at end of year 5,503 3,953
Transfer to asset held for sale   (1)
Tangible exploration and evaluation assets [member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Property, plant and equipment, cost 16,473 12,320
Tangible exploration and evaluation assets [member] | Accumulated depreciation, amortisation and impairment [member]    
IfrsStatementLineItems [Line Items]    
Accumulated depreciation (10,970) (8,367)
Railway Equipment [Member]    
IfrsStatementLineItems [Line Items]    
Balance at beginning of year 2,389 2,088
Disposals (5) (7)
Depreciation, depletion and amortization (89) (75)
Translation adjustment 144 285
Transfers 148 116
Balance at end of year 2,587 2,407
Railway Equipment [Member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Property, plant and equipment, cost 4,647 4,239
Railway Equipment [Member] | Accumulated depreciation, amortisation and impairment [member]    
IfrsStatementLineItems [Line Items]    
Accumulated depreciation (2,060) (1,832)
Right-of-use assets [member]    
IfrsStatementLineItems [Line Items]    
Balance at beginning of year 607 660
Additions (i) 19 34
Depreciation, depletion and amortization (81) (76)
Translation adjustment   32
Impairment 13  
Balance at end of year 558 613
Transfer to asset held for sale   (37)
Right-of-use assets [member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Property, plant and equipment, cost 1,624 1,500
Right-of-use assets [member] | Accumulated depreciation, amortisation and impairment [member]    
IfrsStatementLineItems [Line Items]    
Accumulated depreciation (1,066) (887)
Other property, plant and equipment [member]    
IfrsStatementLineItems [Line Items]    
Balance at beginning of year 2,384 2,192
Disposals (2) (1)
Depreciation, depletion and amortization (224) (188)
Translation adjustment 88 220
Transfers 155 228
Balance at end of year 2,401 2,403
Transfer to asset held for sale   (48)
Other property, plant and equipment [member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Property, plant and equipment, cost 5,943 5,486
Other property, plant and equipment [member] | Accumulated depreciation, amortisation and impairment [member]    
IfrsStatementLineItems [Line Items]    
Accumulated depreciation (3,542) (3,083)
Construction in progress [member]    
IfrsStatementLineItems [Line Items]    
Balance at beginning of year 10,457 9,719
Additions (i) 2,405 2,172
Interest capitalization 10 12
Disposals (42) (181)
Translation adjustment 449 1,144
Transfers (3,099) (1,539)
Balance at end of year 10,180 11,270
Transfer to asset held for sale   (57)
Construction in progress [member] | Gross carrying amount [member]    
IfrsStatementLineItems [Line Items]    
Property, plant and equipment, cost $ 10,180 $ 11,270