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Financial Instruments by Category - Additional Information (Detail) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Level 3 [member] | Estimated Fair Value of Loans [member]      
Disclosure of detailed information about financial instruments [line items]      
Estimated fair value of loans $ 8,811 $ 7,547 $ 5,812