v3.25.4
Software - Schedule of Changes in Software (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about intangible assets [line items]    
Balance as of January 1 $ 1,453  
Balance as of December 31 1,645 $ 1,453
Internally Developed [member]    
Disclosure of detailed information about intangible assets [line items]    
Balance as of January 1 932  
Balance as of December 31 1,013 932
Acquisitions - Business Combinations [member]    
Disclosure of detailed information about intangible assets [line items]    
Balance as of January 1 [1] 518  
Balance as of December 31 [1] 631 518
Purchased [member]    
Disclosure of detailed information about intangible assets [line items]    
Balance as of January 1 3  
Balance as of December 31 1 3
Gross Carrying Amount [Member]    
Disclosure of detailed information about intangible assets [line items]    
Disposals of businesses (1) (87)
Software [member]    
Disclosure of detailed information about intangible assets [line items]    
Amortization (721) (618)
Software [member] | Gross Carrying Amount [Member]    
Disclosure of detailed information about intangible assets [line items]    
Balance as of January 1 6,570 5,858
Additions 881 877
Removed from service (120) (99)
Disposals of businesses (2) (52)
Translation and other, net 54 (14)
Balance as of December 31 7,383 6,570
Software [member] | Gross Carrying Amount [Member] | Internally Developed [member]    
Disclosure of detailed information about intangible assets [line items]    
Balance as of January 1 5,566 5,140
Additions 593 569
Removed from service (120) (99)
Disposals of businesses (2) (52)
Translation and other, net 6 8
Balance as of December 31 6,043 5,566
Software [member] | Gross Carrying Amount [Member] | Acquisitions - Business Combinations [member]    
Disclosure of detailed information about intangible assets [line items]    
Balance as of January 1 [1] 922 636
Additions [1] 288 306
Removed from service [1] 0 0
Disposals of businesses [1] 0 0
Translation and other, net [1] 47 (20)
Balance as of December 31 [1] 1,257 922
Software [member] | Gross Carrying Amount [Member] | Purchased [member]    
Disclosure of detailed information about intangible assets [line items]    
Balance as of January 1 82 82
Additions 0 2
Removed from service 0 0
Disposals of businesses 0 0
Translation and other, net 1 (2)
Balance as of December 31 83 82
Software [member] | Accumulated Amortization [Member]    
Disclosure of detailed information about intangible assets [line items]    
Balance as of January 1 (5,117) (4,622)
Amortization (721) (618)
Removed from service 120 99
Disposals of businesses 2 27
Translation and other, net (22) (3)
Balance as of December 31 (5,738) (5,117)
Software [member] | Accumulated Amortization [Member] | Internally Developed [member]    
Disclosure of detailed information about intangible assets [line items]    
Balance as of January 1 (4,634) (4,288)
Amortization (513) (469)
Removed from service 120 99
Disposals of businesses 2 27
Translation and other, net (5) (3)
Balance as of December 31 (5,030) (4,634)
Software [member] | Accumulated Amortization [Member] | Acquisitions - Business Combinations [member]    
Disclosure of detailed information about intangible assets [line items]    
Balance as of January 1 [1] (404) (256)
Amortization [1] (206) (147)
Removed from service [1] 0 0
Disposals of businesses [1] 0 0
Translation and other, net [1] (16) (1)
Balance as of December 31 [1] (626) (404)
Software [member] | Accumulated Amortization [Member] | Purchased [member]    
Disclosure of detailed information about intangible assets [line items]    
Balance as of January 1 (79) (78)
Amortization (2) (2)
Removed from service 0 0
Disposals of businesses 0 0
Translation and other, net (1) 1
Balance as of December 31 $ (82) $ (79)
[1] See note 30 for further information on acquired software assets.