v3.25.2
Investment Securities - Amortized Cost and Fair Value of Investment Securities by Contractual Maturities (Detail) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Amortized Cost    
Securities held to maturity, Due in one year or less, Amortized Cost $ 24  
Securities held to maturity, After one year through five years, Amortized Cost 18  
Securities held to maturity, After five years through ten years, Amortized Cost 173  
Securities held to maturity, After ten years, Amortized Cost 1,154  
Securities held to maturity, Mortgage backed securities, Amortized Cost 171  
Amortized cost 1,540 $ 1,526
Held-to-maturity    
Securities held to maturity, Due in one year or less, Estimated Fair Value 24  
Securities held to maturity, After one year through five years, Estimated Fair Value 18  
Securities held to maturity, After five years through ten years, Estimated Fair Value 162  
Securities held to maturity, After ten years, Estimated Fair Value 1,026  
Debt securities, held to maturity, Mortgage backed securities, Estimated Fair Value 138  
Investment securities - HTM, fair value 1,368 1,309
Amortized Cost    
Securities available for sale, Due in one year or less, Amortized Cost 1,632  
Securities available for sale, After one year through five years, Amortized Cost 1,912  
Securities available for sale, After five years through ten years, Amortized Cost 840  
Securities available for sale, After ten years, Amortized Cost 4,356  
Securities available for sale, Mortgage backed securities, Amortized Cost 8,754  
Securities available for sale Total, Amortized Cost 17,494  
Estimated Fair Value    
Securities available for sale, Due in one year or less, Estimated Fair Value 1,630  
Securities available for sale, After one year through five years, Estimated Fair Value 1,909  
Securities available for sale, After five years through ten years, Estimated Fair Value 828  
Securities available for sale, After ten years, Estimated Fair Value 4,276  
Securities available for sale, Mortgage backed securities, Estimated Fair Value 8,255  
Securities available for sale Total, Estimated Fair Value $ 16,898 $ 13,468