Commitments, Contingencies and Guarantees - Lending Commitments (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Held for investment	$ 146,043	$ 150,100
Held for sale	11,194	15,245
At fair value	2,370	1,899
Total	$ 159,607	$ 167,244

Amount of lending commitments held-for-investment.

No definition available.

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