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Regulation and Capital Adequacy - Risk-based Capital Requirements Under the Standardized and Advanced Capital Rules and the Leverage Ratios and "Well-capitalized" Requirements (Detail)
Sep. 30, 2020
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]  
Required CET1 ratio applicable to advanced approach banking institutions 9.50%
GS Bank USA [Member]  
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]  
Required CET1 ratio applicable to advanced approach banking institutions 7.00%
Required Tier 1 capital ratio applicable to advanced approach banking institutions 8.50%
Required Total capital ratio applicable to advanced approach banking institutions 10.50%
Required Tier 1 leverage ratio applicable to advanced approach banking institutions 4.00%
SLR 3.00%
Well-capitalized minimum CET1 ratio 6.50%
Well-capitalized minimum Tier 1 capital ratio 8.0
Well-capitalized minimum total capital ratio 10.0
Well-capitalized minimum Tier 1 leverage ratio 5.0
Well-capitalized minimum SLR 6.00%