Income Taxes - Schedule of Reconciliation of U.S. Statutory Income Tax Rate to Company's Effective Tax Rate (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
U.S. statutory tax rate	21.00%	21.00%	21.00%
State and local taxes, net of federal benefit	5.70%	3.70%	2.70%
Income attributable to non-controlling interests	(12.70%)	(16.30%)	(9.30%)
Subtotal	14.00%	8.40%	14.40%
Non-creditable foreign and domestic taxes - non-controlling interest	30.70%	(4.60%)	14.00%
Non-creditable foreign taxes - RE/MAX Holdings	8.70%	(0.50%)	8.10%
Foreign derived intangible income deduction	(8.60%)
Other permanent differences	23.30%	(3.40%)	4.30%
Uncertain tax positions		2.40%
Foreign Tax Rate Differential	(2.50%)
162(m) compensation limitation	1.60%		1.10%
Valuation Allowance	(108.00%)	(153.10%)
Effect of permanent difference - adjustment TRA liability	4.80%	15.00%
Other	5.70%	(1.30%)	(1.20%)
Effective tax rate	(30.30%)	(137.10%)	40.70%
Percentage of non controlling interest income not subject to income taxes	40.00%
RIHI | RMCO, LLC
Non-controlling interest ownership of common units in RMCO	39.80%	40.70%
RIHI | RMCO, LLC | Maximum
Non-controlling interest ownership of common units in RMCO	40.00%