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Cash and Cash Equivalents and Investment Securities - Additional Information (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about borrowings [line items]    
Restricted cash $ 106 $ 99
Amounts deposited on a blocked account 80  
Current debt securities 306 221
Debt securities [member]    
Disclosure of detailed information about borrowings [line items]    
Current debt securities $ 306 $ 221