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Financial Instruments - Summary of Debt Summarized by Interest Rates and Currencies (Detail) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 189 $ 25    
Long- term 5,340 6,203    
Total 5,529 6,228 $ 6,971 $ 7,379
Floating interest rate [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term 23 13    
Long- term 1,305 1,968    
Total $ 1,328 $ 1,981    
Short-term 5.10% 6.40%    
Long-term 6.00% 7.10%    
Fixed interest rate [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 166 $ 12    
Long- term 4,035 4,235    
Total $ 4,201 $ 4,247    
Short-term 7.30% 4.40%    
Long-term 4.60% 5.00%    
US Dollar [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 161 $ 1    
Long- term 3,595 4,348    
Total $ 3,756 $ 4,349    
Effective rate 5.10% 5.50%    
Euro [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 2 $ 9    
Long- term 876 990    
Total $ 878 $ 999    
Effective rate 3.90% 4.20%    
Mexican pesos [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 0 $ 0    
Long- term 842 704    
Total $ 842 $ 704    
Effective rate 11.20% 12.00%    
Philippine pesos [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 0 $ 11    
Long- term 0 112    
Total $ 0 $ 123    
Effective rate 0.00% 7.10%    
Other Currencies [Member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 26 $ 4    
Long- term 27 49    
Total $ 53 $ 53    
Effective rate 5.40% 4.50%