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Property, Plant and Equipment - Detailed Information About Property, Plant and Equipment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance $ 23,503  
Ending balance 23,664 $ 23,503
Carrying amount 23,664 23,503
Acquisition cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 51,547 54,522
Effect of movements in foreign exchange 3,669 (4,424)
Acquisitions 2,744 2,989
Acquisitions through business combinations   16
Disposals through sale and derecognition (2,644) (2,271)
Disposals through the sale of subsidiaries (27) (9)
Transfer (to)/from other asset categories and other movements [1] 1,698 724
Ending balance 56,987 51,547
Carrying amount 56,987 51,547
Depreciation and impairment losses [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (30,252) (30,430)
Effect of movements in foreign exchange (2,082) 2,367
Depreciation (3,329) (3,518)
Disposals through sale and derecognition 2,572 2,121
Disposals through the sale of subsidiaries 18 5
Impairment losses (456) (247)
Transfer (to)/from other asset categories and other movements [1] (2,090) (550)
Ending balance (35,619) (30,252)
Carrying amount (35,619) (30,252)
Land and buildings [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 7,307  
Ending balance 7,486 7,307
Carrying amount 7,486 7,307
Land and buildings [member] | Acquisition cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 12,325  
Effect of movements in foreign exchange 808  
Acquisitions 32  
Disposals through sale and derecognition (258)  
Disposals through the sale of subsidiaries (9)  
Transfer (to)/from other asset categories and other movements [1] 331  
Ending balance 13,229 12,325
Carrying amount 13,229 12,325
Land and buildings [member] | Depreciation and impairment losses [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (5,018)  
Effect of movements in foreign exchange (317)  
Depreciation (385)  
Disposals through sale and derecognition 243  
Disposals through the sale of subsidiaries 4  
Impairment losses (66)  
Transfer (to)/from other asset categories and other movements [1] (204)  
Ending balance (5,743) (5,018)
Carrying amount (5,743) (5,018)
Plant and equipment fixtures and fittings [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 12,821  
Ending balance 12,871 12,821
Carrying amount 12,871 12,821
Plant and equipment fixtures and fittings [member] | Acquisition cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 38,056  
Effect of movements in foreign exchange 2,764  
Acquisitions 878  
Disposals through sale and derecognition (2,385)  
Disposals through the sale of subsidiaries (18)  
Transfer (to)/from other asset categories and other movements [1] 3,452  
Ending balance 42,747 38,056
Carrying amount 42,747 38,056
Plant and equipment fixtures and fittings [member] | Depreciation and impairment losses [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance (25,235)  
Effect of movements in foreign exchange (1,765)  
Depreciation (2,944)  
Disposals through sale and derecognition 2,329  
Disposals through the sale of subsidiaries 15  
Impairment losses (390)  
Transfer (to)/from other asset categories and other movements [1] (1,886)  
Ending balance (29,876) (25,235)
Carrying amount (29,876) (25,235)
Under construction [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 1,166  
Ending balance 1,011 1,166
Carrying amount 1,011 1,166
Under construction [member] | Acquisition cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 1,166  
Effect of movements in foreign exchange 97  
Acquisitions 1,833  
Disposals through sale and derecognition (1)  
Transfer (to)/from other asset categories and other movements [1] (2,085)  
Ending balance 1,011 1,166
Carrying amount 1,011 1,166
Property Plant And Equipment Owned [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Beginning balance 21,295  
Ending balance 21,368 21,295
Carrying amount $ 21,368 $ 21,295
[1] The transfer (to)/from other asset categories and other movements relates mainly to transfers from assets under construction to their respective asset categories, to contributions of assets to pension plans, to the separate presentation in the statement of financial position of property, plant and equipment held for sale in accordance with IFRS 5 Non-current assets held for sale and discontinued operations and to the restatement of non-monetary assets under hyperinflation accounting in line with IAS 29 Financial reporting in hyperinflationary economies.