XML 86 R72.htm IDEA: XBRL DOCUMENT
v3.22.4

Derivatives - Additional Information (Detail) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Replacement costs of contracts in a gain position | $ 3.8 | $ 2.9

X
- Definition The replacement cost of derivative contracts in a gain or asset position. + References No definition available. + Details
Name: | bgcp_DerivativeContractInGainPositionReplacementCost
Namespace Prefix: | bgcp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration