Deposits - Maturities of Time Deposits (Parenthetical) (Detail) $ in Millions	Sep. 30, 2020 USD ($)
Deposits [Abstract]
Total domestic time deposits in denominations that met or exceeded the applicable insurance limits, or were otherwise not covered by insurance	$ 12,920
Total foreign time deposits in denominations that met or exceeded the applicable insurance limits, or were otherwise not covered by insurance	$ 13,410

Total domestic time deposits in denominations that met or exceeded the applicable insurance limits, or were otherwise not covered by insurance.

No definition available.

Name:	gs_TimeDepositsInDenominationsThatMetOrExceededTheApplicableInsuranceLimitsOrWereOtherwiseNotCoveredByInsuranceDomestic
Namespace Prefix:	gs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant