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Related Party Transactions - Cantor Rights to Purchase Cantor Units from BGC Holdings (Details) - Related Party - BGC Holdings LPUs - USD ($) | Jun. 30, 2023 | Apr. 16, 2023 | Oct. 25, 2022 | May 17, 2022
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Related Party Transaction [Line Items] |  |  |  |
Aggregate Cantor units as result of redemption (in shares) |  |  |  | 427,494
Aggregate consideration of Cantor units as result of redemption |  |  |  | $ 841,010
Number of founding partner interests as result of redemption (in shares) | 5,425,209 | 533,757 | 275,833 | 427,494
Aggregate related party units (in shares) | 324,223 | 85,775 | 77,507 | 52,681
Aggregate consideration of Cantor units | $ 598,712 | $ 173,154 |  | $ 105,867
Number of founding partner interests exchanged (in shares) | 324,223 | 85,775 | 77,507 | 52,681
Aggregate related party units as result of redemption (in shares) | 5,425,209 | 533,757 | 275,833 |
Aggregate consideration of related party units as result of redemption (in shares) | $ 9,715,772 | $ 1,051,080 | $ 397,196 |
Aggregate consideration of Cantor Units |  |  | $ 142,613 |

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