Segment Reporting - Reconciliation of Segment Income to Net Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	$ 698			$ 642			$ 1,951	$ 1,790
Impact of equity method investments	1			8			19	30
Other operating expenses (income), net	10			(27)			20	(68)
EBITDA	629			607			1,725	1,695
Depreciation and amortization	47			46			142	143
Income from operations	582			561			1,583	1,552
Interest expense, net	143			133			430	389
Loss on early extinguishment of debt	16			0			16	0
Income tax expense (benefit)	59			(102)			145	17
Net income	364	$ 351	$ 277	530	$ 346	$ 270	992	1,146
Unallocated Management G&A
Segment Reporting, Revenue Reconciling Item [Line Items]
Share-based compensation and non-cash incentive compensation expense	49			34			141	93
Corporate restructuring and advisory fees	5			12			17	21
Impact of equity method investments	5			13			29	41
Other operating expenses (income), net	10			(27)			20	(68)
Unallocated Management G&A | Firehouse Subs brand
Segment Reporting, Revenue Reconciling Item [Line Items]
FHS Transaction costs	0			3			19	8
TH | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	311			305			852	810
BK | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	298			262			842	761
PLK | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	75			62			214	179
FHS | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	$ 14			$ 13			$ 43	$ 40