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Contingent Liabilities and Assets - Summary of Contingent Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of contingent liabilities [line items]    
Contingent liabilities and assets $ 282 $ 262
Contingent liabilities [member]    
Disclosure of contingent liabilities [line items]    
Contingent liabilities and assets 281 260
Guarantees [member]    
Disclosure of contingent liabilities [line items]    
Contingent liabilities and assets $ 1 $ 2