Revenue Recognition - Deferred Revenue (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Deferred Revenue Arrangement [Line Items]
Deferred Revenue		$ 84	$ 94
Deferred Revenue, Revenue Recognized		173
Movement in Deferred Revenue [Roll Forward]
Additions during the period		163
Recognized as Revenue during the period		(173)
Ending Balance at December 31, 2023		84
Franchise Group
Deferred Revenue Arrangement [Line Items]
Deferred Revenue	[1]	69	80
Deferred Revenue, Revenue Recognized	[1]	165
Deferred Sales Commission		29		$ 28
Movement in Deferred Revenue [Roll Forward]
Additions during the period	[1]	154
Recognized as Revenue during the period	[1]	(165)
Ending Balance at December 31, 2023	[1]	69
Franchise Group | Brand Marketing Fees
Deferred Revenue Arrangement [Line Items]
Deferred Revenue		19	26
Movement in Deferred Revenue [Roll Forward]
Ending Balance at December 31, 2023		19
Franchise Group | Area Development Fees
Deferred Revenue Arrangement [Line Items]
Deferred Revenue		39	40
Deferred Revenue, Revenue Recognized		4
Movement in Deferred Revenue [Roll Forward]
Additions during the period		3
Recognized as Revenue during the period		(4)
Ending Balance at December 31, 2023		39
Franchise Group | Outsourcing Management Fees
Deferred Revenue Arrangement [Line Items]
Deferred Revenue		3	4
Deferred Revenue, Revenue Recognized		43
Movement in Deferred Revenue [Roll Forward]
Additions during the period		42
Recognized as Revenue during the period		(43)
Ending Balance at December 31, 2023		3
Franchise Group | Network Fees
Deferred Revenue Arrangement [Line Items]
Deferred Revenue		2	0
Deferred Revenue, Revenue Recognized		4
Movement in Deferred Revenue [Roll Forward]
Additions during the period		6
Recognized as Revenue during the period		(4)
Ending Balance at December 31, 2023		$ 2
Franchise Group | Minimum
Deferred Revenue Arrangement [Line Items]
Outsourcing Management Fees Period		3 months
Franchise Group | Maximum
Deferred Revenue Arrangement [Line Items]
Outsourcing Management Fees Period		6 months
Franchise Group | International Franchise Rights
Deferred Revenue Arrangement [Line Items]
Amortization period		25 years
Franchise Group | Franchise Rights
Deferred Revenue Arrangement [Line Items]
Amortization period		30 years
Owned Brokerage Group
Deferred Revenue Arrangement [Line Items]
Deferred Revenue		$ 15	14
Deferred Revenue, Revenue Recognized		8
Movement in Deferred Revenue [Roll Forward]
Additions during the period		9
Recognized as Revenue during the period		(8)
Ending Balance at December 31, 2023		15
Owned Brokerage Group | New Development Business
Deferred Revenue Arrangement [Line Items]
Deferred Revenue		12	$ 11
Deferred Revenue, Revenue Recognized		5
Movement in Deferred Revenue [Roll Forward]
Additions during the period		6
Recognized as Revenue during the period		(5)
Ending Balance at December 31, 2023		$ 12
Owned Brokerage Group | Minimum
Deferred Revenue Arrangement [Line Items]
New Development Period		18 months
Owned Brokerage Group | Maximum
Deferred Revenue Arrangement [Line Items]
New Development Period		24 months

[1] Revenues recognized include intercompany marketing fees paid by Owned Brokerage Group.