Organization and Basis of Presentation (Details) - USD ($)				12 Months Ended
	Jul. 02, 2023	Jul. 01, 2023	Jun. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Jul. 01, 2024
Description Of Business [Line Items]
Share-based payment arrangement, total shares (in shares)			0
Conversion of stock, shares converted (in shares)		64,000,000
Minimum number of shares required to be issued (in shares)		75,000,000
Stock Purchased On 6/30/2023
Description Of Business [Line Items]
Conversion of stock, shares converted (in shares)		5,700,000
Related Party
Description Of Business [Line Items]
Issuance of common stock (in shares)				0	0
Non-exchangeable Limited Partnership Interests
Description Of Business [Line Items]
Share-based payment arrangement, expense			$ 60,900,000
Exchangeable Limited Partnership Units | Related Party
Description Of Business [Line Items]
Shares redeemed in period (in shares)			1,500,000
Restricted Stock Units (RSUs)
Description Of Business [Line Items]
Shares granted in period (in shares)		25,300,000
Exchange ratio			1
Share-based payment arrangement, decrease for tax withholding obligation		$ 74,000,000	$ 49,200,000
Restricted Stock Units (RSUs) | Related Party
Description Of Business [Line Items]
Shares granted in period (in shares)			16,900,000
Non-exchangeable FPUs | Related Party
Description Of Business [Line Items]
Shares redeemed in period (in shares)			5,600,000
Cantor Units | Related Party
Description Of Business [Line Items]
Shares redeemed in period (in shares)			324,223
Cantor Units | Related Party | Cantor
Description Of Business [Line Items]
Shares redeemed in period (in shares)			5,425,209
Aggregate consideration			$ 9,715,772
FPU | Related Party
Description Of Business [Line Items]
Shares redeemed in period (in shares)			5,425,209
Exchange of units (in shares)			324,223
FPU & Cantor Units | Related Party
Description Of Business [Line Items]
Aggregate consideration			$ 598,712
Restricted Shares
Description Of Business [Line Items]
Share-based payment arrangement, expense				$ 57,000,000.0	$ 24,700,000
Restricted Shares | Maximum
Description Of Business [Line Items]
Shares granted in period (in shares)		38,600,000
Class A Common Stock
Description Of Business [Line Items]
Common stock, par value (in dollars per share)				$ 0.01	$ 0.01
Shares granted in period (in shares)		600,000,000
Exchange ratio		1
Share-based payment arrangement, decrease for tax withholding obligation				$ 41,000,000	$ 3,900,000
Issuance of common stock (in shares)				314,591	518,191	500,697
Common stock, shares authorized (in shares)				1,500,000,000	1,500,000,000		1,500,000,000
Class A Common Stock | Share-Based Payment Arrangement | Related Party
Description Of Business [Line Items]
Shares granted in period (in shares)			1,000,000
Class A Common Stock | BGC Parnters
Description Of Business [Line Items]
Common stock, par value (in dollars per share)		$ 0.01
Class A Common Stock | BGC Group
Description Of Business [Line Items]
Common stock, par value (in dollars per share)		$ 0.01
Class B Common Stock
Description Of Business [Line Items]
Common stock, par value (in dollars per share)				$ 0.01	$ 0.01
Exchange ratio		1
Issuance of common stock (in shares)	15,800,000		64,000,000	0	64,000,000
Common stock, shares authorized (in shares)				300,000,000	300,000,000		300,000,000
Class B Common Stock | BGC Parnters
Description Of Business [Line Items]
Common stock, par value (in dollars per share)		$ 0.01
Class B Common Stock | BGC Group
Description Of Business [Line Items]
Common stock, par value (in dollars per share)		$ 0.01