Regulation and Capital Adequacy - Risk-based Capital Ratios (Parenthetical) (Detail)	12 Months Ended
Dec. 31, 2020
CECL adoption, percentage of increase in regulatory capital to increase in allowance for credit loss	25.00%

Increase in Common Equity Tier One Capital Ratio in relation to changes to the calculation of loss given default.

No definition available.

Name:	gs_IncreaseInCommonEquityTierOneCapitalRatioInRelationToChangesToTheCalculationOfLossGivenDefault
Namespace Prefix:	gs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration