Income Taxes - Schedule of Reconciliation of U.S. Statutory Income Tax Rate to Company's Effective Tax Rate (Details)	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
U.S. statutory tax rate	21.00%	21.00%	21.00%
State and local taxes, net of federal benefit	3.70%	2.70%	3.10%
Income attributable to non-controlling interests	(16.30%)	(9.30%)	(9.30%)
Subtotal	8.40%	14.40%	14.80%
Non-creditable foreign and domestic taxes - non-controlling interest	(4.60%)	14.00%	(7.00%)
Non-creditable foreign taxes - RE/MAX Holdings	(0.50%)	8.10%	(3.70%)
Foreign derived intangible income deduction			4.40%
Other permanent differences	(3.40%)	4.30%	(1.20%)
Uncertain Tax Positions	2.40%		6.10%
Loss on contract settlement			(26.70%)
Adjustments to state taxes			3.90%
162(m) compensation limitation		1.10%	(1.80%)
Valuation Allowance	(153.10%)
Effect of permanent difference - reduction in TRA liability	15.00%
Other	(1.30%)	(1.20%)	0.10%
Effective tax rate	(137.10%)	40.70%	(11.10%)
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	40.70%	41.30%
RIHI \| RMCO, LLC \| Maximum
Non-controlling interest ownership of common units in RMCO	40.00%

Percentage of reported income tax expense (benefit) attributable to 162(m) compensation limitation.

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Percentage of domestic federal and state tax rate applicable to pretax income (loss).

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- Definition

Effective Income Tax Rate Reconciliation, Tax Credit, Foreign And Domestic Noncontrolling Interest, Percent

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No definition available.

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Effective Income Tax Rate Reconciliation, Tax Credit, Foreign And Domestic, Percent

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- Definition

Percentage of income earned through non controlling interest not subject to income taxes.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-12

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-12

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.Fact.4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479360/740-10-S99-1

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482685/740-10-50-12

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.Fact.4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479360/740-10-S99-1

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Percentage of reported income tax benefit from difference to income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to foreign-derived intangible income (FDII).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to noncontrolling interest income (loss) exempt from income taxes.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax settlements. Including, but not limited to, domestic tax settlement, foreign tax settlement, state and local tax settlement, and other tax settlements.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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