v3.26.1
Regulation and Capital Adequacy - Risk-Based Capital and Leverage Requirements (Detail)
Mar. 31, 2026
Dec. 31, 2025
Oct. 01, 2025
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) 0.035 0.030  
Stress capital buffer 3.40% 3.40% 3.40%
Counter-cyclical capital buffer 0 0  
Total 6.90% 6.40%  
Total risk-based capital requirements      
CET1 capital ratio 11.40% 10.90%  
Tier 1 capital ratio 12.90% 12.40%  
Total capital ratio 14.90% 14.40%  
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) 0.035 0.030  
Capital conservation buffer 0.025 0.025  
Counter-cyclical capital buffer 0 0  
Total 6.00% 5.50%  
Total risk-based capital requirements      
CET1 capital ratio 10.50% 10.00%  
Tier 1 capital ratio 12.00% 11.50%  
Total capital ratio 14.00% 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