Segment Reporting - Reconciliation of Segment Income to Net Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	$ 618		$ 577		$ 1,148	$ 1,057
Impact of equity method investments	9		3		22	5
Other operating expenses (income), net	(25)		8		(41)	(34)
EBITDA	589		539		1,088	1,030
Depreciation and amortization	48		51		97	100
Income from operations	541		488		991	930
Interest expense, net	129		126		256	250
Income tax expense	66		(29)		119	18
Net income	346	$ 270	391	$ 271	616	662
Unallocated Management G&A
Segment Reporting, Revenue Reconciling Item [Line Items]
Share-based compensation and non-cash incentive compensation expense	32		20		59	46
Corporate restructuring and tax advisory fees	6		3		9	4
Impact of equity method investments	12		7		28	11
Other operating expenses (income), net	(25)		8		(41)	(34)
Unallocated Management G&A | Firehouse Subs brand
Segment Reporting, Revenue Reconciling Item [Line Items]
FHS Transaction costs	4		0		5	0
TH | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	274		253		505	460
BK | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	270		266		499	483
PLK | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	61		58		117	114
FHS | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	$ 13		$ 0		$ 27	$ 0