Segment Reporting - Reconciliation of Segment Income to Net Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	$ 577		$ 358		$ 1,057	$ 802
Impact of equity method investments	3		16		5	18
Other operating expenses (income), net	8		21		(34)	5
EBITDA	539		289		1,030	723
Depreciation and amortization	51		46		100	91
Income from operations	488		243		930	632
Interest expense, net	126		128		250	247
Income tax (benefit) expense	(29)		(49)		18	(3)
Net income	391	$ 271	164	$ 224	662	388
Unallocated Management G&A
Segment Reporting, Revenue Reconciling Item [Line Items]
Share-based compensation and non-cash incentive compensation expense	20		23		46	44
Corporate restructuring and tax advisory fees	3		7		4	8
Impact of equity method investments	7		18		11	22
Other operating expenses (income), net	8		21		(34)	5
TH | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	253		147		460	336
BK | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	266		160		483	360
PLK | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Adjusted EBITDA	$ 58		$ 51		$ 114	$ 106