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Regulation and Capital Adequacy - Risk-based Capital and Leverage Ratios and "Well-capitalized" Requirements (Detail) - GS Bank USA [Member]
Jun. 30, 2021
Dec. 31, 2020
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Required CET1 ratio applicable to advanced approach banking institutions 7.00% 7.00%
Required Tier 1 capital ratio applicable to advanced approach banking institutions 8.50% 8.50%
Required Total capital ratio applicable to advanced approach banking institutions 10.50% 10.50%
Required Tier 1 leverage ratio applicable to advanced approach banking institutions 4.00% 4.00%
SLR 3.00% 3.00%
Well-capitalized minimum CET1 ratio 6.50% 6.50%
Well-capitalized minimum Tier 1 capital ratio 0.080 0.080
Well-capitalized minimum total capital ratio 0.100 0.100
Well-capitalized minimum Tier 1 leverage ratio 0.050 0.050
Well-capitalized minimum SLR 6.00% 6.00%