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Stockholders' Equity - Schedule of Noncontrolling Interests (Details) - RSILP - Owners Other Than Rush Street Interactive	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Noncontrolling Interest [Roll Forward]
Non-controlling interest percentage at beginning of period	70.55%	72.20%
Issuance of Class A Common Stock upon RSILP Unit Exchanges	(0.0249)	(0.0146)
Issuance of Class A Common Stock in connection with the vesting of certain share-based equity grants	(0.0055)	(0.0023)
Non-controlling interest percentage at end of period	67.51%	70.55%
Class A Common Stock
Noncontrolling Interest [Roll Forward]
Issuance of common stock as purchase consideration		(0.0002)
Class V Common Stock
Noncontrolling Interest [Roll Forward]
Issuance of common stock as purchase consideration		0.0006