v3.21.2
Regulation and Capital Adequacy - Risk-based Capital Ratios (Parenthetical) (Detail)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Sep. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
CECL adoption, percentage of increase in regulatory capital to increase in allowance for credit loss 25.00% 25.00%        
Jr subordinated debt included in Tier 2 capital 10.00% 20.00%        
Jr subordinated debt phased out of regulatory capital 90.00% 80.00%        
Standardized Capital Rules [Member]            
Risk weighted assets $ 663,936 $ 554,162 $ 621,000 $ 595,000 $ 535,000 $ 563,575
Decrease to standardized CET1 capital ratio based on regulatory feedback   0.6 0.5 0.5 0.5  
Decrease to standardized CET1 and Tier1 capital ratios based on regulatory feedback 0.5          
Decrease in standardized tier 1 capital ratios   0.6 0.6 0.6 0.6  
Decrease In standardized total capital ratio 0.7 0.8 0.7 0.7 0.7  
CET1 capital ratio 14.1 14.7 14.4 14.3 14.5  
Tier One Risk Based Capital to Risk Weighted Assets 15.5 16.7 15.9 15.9 16.6  
Capital to Risk Weighted Assets 17.7 19.5 18.3 18.4 19.6  
Increase in Standardized RWAs Based on Regulatory Feedback $ 23,000 $ 23,000 $ 23,000 $ 22,000 $ 20,000  
GS Bank USA [Member] | Standardized Capital Rules [Member]            
Risk weighted assets $ 343,033 $ 280,877        
Decrease to standardized CET1 capital ratio based on regulatory feedback   0.4        
Decrease in standardized tier 1 capital ratios   0.4        
Decrease In standardized total capital ratio   0.6        
CET1 capital ratio 11.9 12.3        
Tier One Risk Based Capital to Risk Weighted Assets 11.9 12.3        
Capital to Risk Weighted Assets 13.7 14.6        
Increase in Standardized RWAs Based on Regulatory Feedback $ 10,000 $ 11,000        
Decrease In standardized capital ratio 0.4