v3.25.4
Regulation and Capital Adequacy - Risk-Based Capital and Leverage Requirements (Detail)
Jan. 01, 2026
Dec. 31, 2025
Oct. 01, 2025
Jun. 30, 2025
Dec. 31, 2024
Capital conservation buffer requirements          
G-SIB surcharge (Method 2)   0.030      
Subsequent Event          
Capital conservation buffer requirements          
G-SIB surcharge (Method 2) 0.035        
Total risk-based capital requirements          
Increase in total risk-based capital requirements 0.50%        
Standardized          
Risk-based capital minimum requirements          
CET1 capital ratio   0.045     0.045
Tier 1 capital ratio   0.060     0.060
Total capital ratio   0.080     0.080
Capital conservation buffer requirements          
G-SIB surcharge (Method 2)   0.030     0.030
Stress capital buffer   3.40% 3.40% 6.10% 6.20%
Counter-cyclical capital buffer   0     0
Total   6.40%     9.20%
Total risk-based capital requirements          
CET1 capital ratio   10.90%     13.70%
Tier 1 capital ratio   12.40%     15.20%
Total capital ratio   14.40%     17.20%
Advanced          
Risk-based capital minimum requirements          
CET1 capital ratio   0.045     0.045
Tier 1 capital ratio   0.060     0.060
Total capital ratio   0.080     0.080
Capital conservation buffer requirements          
G-SIB surcharge (Method 2)   0.030     0.030
Capital conservation buffer   0.025     0.025
Counter-cyclical capital buffer   0     0
Total   5.50%     5.50%
Total risk-based capital requirements          
CET1 capital ratio   10.00%     10.00%
Tier 1 capital ratio   11.50%     11.50%
Total capital ratio   13.50%     13.50%
Reportable Legal Entities          
Risk-based capital minimum requirements          
CET1 capital ratio   0.045     0.045
Tier 1 capital ratio   0.060     0.060
Total capital ratio   0.105     0.105
Reportable Legal Entities | Standardized          
Capital conservation buffer requirements          
Counter-cyclical capital buffer   0     0
Reportable Legal Entities | Advanced          
Capital conservation buffer requirements          
Capital conservation buffer   0.025     0.025