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Interest-Bearing Loans and Borrowings - Summary of Total Principal Amount Repurchased in the Tender Offer (Detail) - USD ($)
$ in Millions
Dec. 29, 2025
Nov. 18, 2025
May 30, 2025
Oct. 31, 2025
May 31, 2025
Disclosure of detailed information about borrowings [line items]          
Principal amount repurchased       $ 2,000 $ 1,600
4.750% Notes due 2029 [Member]          
Disclosure of detailed information about borrowings [line items]          
 Date of repurchase     May 30, 2025    
Issuer     ABIWW    
Title of series of notes partially repurchased     4.75%    
Notes Repurchased Maturity Period     Notes due 2029    
Currency     USD    
Original principal amount outstanding     $ 4,250    
Principal amount repurchased     1,321    
Principal amount not repurchased     $ 2,929    
4.900% Notes due 2046 [Member]          
Disclosure of detailed information about borrowings [line items]          
 Date of repurchase     May 30, 2025    
Issuer     ABIWW and ABC    
Title of series of notes partially repurchased     4.90%    
Notes Repurchased Maturity Period     Notes due 2046    
Currency     USD    
Original principal amount outstanding     $ 9,160    
Principal amount repurchased     330    
Principal amount not repurchased     $ 8,830    
4.900% Notes due 2046 One [Member]          
Disclosure of detailed information about borrowings [line items]          
 Date of repurchase     May 30, 2025    
Issuer     ABIFI    
Title of series of notes partially repurchased     4.90%    
Notes Repurchased Maturity Period     Notes due 2046    
Currency     USD    
Original principal amount outstanding     $ 1,457    
Principal amount repurchased     167    
Principal amount not repurchased     $ 1,291    
4.000% Notes due 2028 [Member]          
Disclosure of detailed information about borrowings [line items]          
 Date of repurchase     May 30, 2025    
Issuer     ABIWW    
Title of series of notes partially repurchased     4.00%    
Notes Repurchased Maturity Period     Notes due 2028    
Currency     USD    
Original principal amount outstanding     $ 1,632    
Principal amount repurchased     $ 1,632    
2.700% Notes due 2026 [Member]          
Disclosure of detailed information about borrowings [line items]          
 Date of repurchase   Nov. 18, 2025      
Issuer   ABISA      
Title of series of notes partially repurchased   2.70%      
Notes Repurchased Maturity Period   Notes due 2026      
Currency   EUR      
Original principal amount outstanding   $ 615      
Principal amount repurchased   $ 615      
3.650% Notes due 2026 [member]          
Disclosure of detailed information about borrowings [line items]          
 Date of repurchase Dec. 29, 2025        
Issuer ABIWW and ABC        
Title of series of notes partially repurchased 3.65%        
Notes Repurchased Maturity Period Notes due 2026        
Currency USD        
Original principal amount outstanding $ 1,307        
Principal amount repurchased $ 1,307