v3.26.1
Guarantee Arrangements, Pledged Assets and Repurchase Agreements - Summary of Pledged Assets Included in Consolidated Balance Sheet (Detail) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Interest bearing deposits with banks $ 23,893 $ 23,148  
Trading assets 27,731 22,757  
Securities available-for-sale 32,817 30,030  
Securities held-to-maturity 20,489 18,293  
Loans 62,103 59,894  
Other assets 6,976 6,261  
Total assets 180,708 172,410 $ 176,367
Asset Pledged as Collateral      
Financial Instruments Owned and Pledged as Collateral [Line Items]      
Interest bearing deposits with banks 400 700  
Trading assets 4,400 4,000  
Securities available-for-sale 14,100 14,600  
Securities held-to-maturity 12,800 12,700  
Loans 21,100 21,600  
Other assets 1,000 700  
Total assets $ 53,800 $ 54,300