Segment, Geographic and Revenue Information - Trading Revenues by Product Type (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue
Trading revenues	$ 12,810	$ 13,983	$ 11,274
Interest rate
Disaggregation of Revenue
Trading revenues	740	2,978	2,773
Foreign exchange
Disaggregation of Revenue
Trading revenues	1,008	902	395
Equity
Disaggregation of Revenue
Trading revenues	7,331	6,200	5,246
Commodity and other
Disaggregation of Revenue
Trading revenues	2,599	1,762	1,617
Credit
Disaggregation of Revenue
Trading revenues	$ 1,132	$ 2,141	$ 1,243

Amount of gain (loss) resulting from the difference between the acquisition price and the selling price or fair value of trading assets and trading liabilities, conducted separately from customer trading activities. Includes, but is not limited to, changes in fair value of trading assets and trading liabilities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_TradingGainsLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration