Business and Organization (Details)	12 Months Ended
	Dec. 31, 2021 state Office Vote class	Jul. 21, 2021 item	Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of classes of common stock | class	2
RMCO, LLC
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Parent economic interest in RMCO (as a percentage)	60.00%		59.40%
RIHI | RMCO, LLC
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Non-controlling interest ownership of common units in RMCO	40.00%		40.60%
Minimum
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of agents | item		19,000
Minimum | Motto
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of offices | Office	185
Number of states in which entity operates | state	35
REMAX | Motto
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of Company consisting of franchises	100.00%
Common Class A
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of votes per share held | Vote	1
Common Class A | One Company Founder [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Ownership percentage	1.10%
Common Class B | RIHI
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Ownership percentage	40.00%