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Cash and Cash Equivalents and Investment Securities - Additional Information (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Disclosure of detailed information about borrowings [line items]    
Restricted cash $ 105 $ 106
Amounts deposited on a blocked account 77  
Current debt securities 353 306
Debt securities [member]    
Disclosure of detailed information about borrowings [line items]    
Current debt securities $ 353 $ 306