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Financial Instruments - Summary of Debt Summarized by Interest Rates and Currencies (Detail) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 51 $ 73    
Long- term 6,920 7,306    
Total 6,971 7,379 $ 9,339 $ 9,365
Floating interest rate [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term 0 27    
Long- term 1,750 896    
Total $ 1,750 $ 923    
Short-term 3.20% 2.70%    
Long-term 4.60% 2.60%    
Fixed interest rate [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 51 $ 46    
Long- term 5,170 6,410    
Total $ 5,221 $ 6,456    
Short-term 5.10% 5.20%    
Long-term 5.30% 4.80%    
US Dollar [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 5 $ 6    
Long- term 5,511 6,375    
Total $ 5,516 $ 6,381    
Effective rate 5.70% 4.40%    
Euro [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 2 $ 1    
Long- term 962 453    
Total $ 964 $ 454    
Effective rate 3.30% 3.10%    
Mexican pesos [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 0 $ 0    
Long- term 267 254    
Total $ 267 $ 254    
Effective rate 12.20% 7.20%    
Philippine pesos [member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 8 $ 66    
Long- term 139 109    
Total $ 147 $ 175    
Effective rate 5.40% 4.40%    
Other Currencies [Member]        
Disclosure of detailed information about financial instruments [line items]        
Short- term $ 36 $ 0    
Long- term 41 115    
Total $ 77 $ 115    
Effective rate 4.30% 4.10%