Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net Income (loss) attributable to CorePoint Lodging stockholders	$ (13)	$ 13	$ (76)	$ 31
Cash flow hedge adjustment, net of tax		1	4	3
Gain on termination of cash flow hedge			(3)
Comprehensive net income (loss) attributable to CorePoint Lodging's Stockholders	$ (13)	$ 14	$ (75)	$ 34