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Financial Instruments - Summary of Debt Summarized by Interest Rates and Currencies (Detail) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 25 $ 51    
Long- term 6,203 6,920    
Total 6,228 6,971 $ 7,379 $ 9,339
Floating interest rate [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term 13 0    
Long- term 1,968 1,750    
Total $ 1,981 $ 1,750    
Short-term 6.40% 3.20%    
Long-term 7.10% 4.60%    
Fixed interest rate [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 12 $ 51    
Long- term 4,235 5,170    
Total $ 4,247 $ 5,221    
Short-term 4.40% 5.10%    
Long-term 5.00% 5.30%    
US Dollar [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 1 $ 5    
Long- term 4,348 5,511    
Total $ 4,349 $ 5,516    
Effective rate 5.50% 5.70%    
Euro [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 9 $ 2    
Long- term 990 962    
Total $ 999 $ 964    
Effective rate 4.20% 3.30%    
Mexican pesos [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 0 $ 0    
Long- term 704 267    
Total $ 704 $ 267    
Effective rate 12.00% 12.20%    
Philippine pesos [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 11 $ 8    
Long- term 112 139    
Total $ 123 $ 147    
Effective rate 7.10% 5.40%    
Other Currencies [Member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 4 $ 36    
Long- term 49 41    
Total $ 53 $ 77    
Effective rate 4.50% 4.30%