Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 23	$ 34
Currency translation adjustment	0	(1)
Defined benefit pension plan—amortization of actuarial loss to periodic pension cost	1	1
Other comprehensive income, before tax	1	0
Income tax expense (benefit) related to items of other comprehensive income amounts	0	0
Other comprehensive income, net of tax	1	0
Comprehensive income	24	34
Less: comprehensive income attributable to noncontrolling interests	0	(1)
Comprehensive income attributable to Realogy Holdings and Realogy Group	$ 24	$ 33