Intangible Assets, net and Goodwill - Schedule of Intangible Assets, net and Goodwill (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross	$ 843	$ 852
Accumulated Amortization	(342)	(330)
Net	501	522
Indefinite-lived Intangible Assets [Line Items]
Intangible assets, net	10,820	10,701
Goodwill [Line Items]
Goodwill	5,831	5,739
Tim Hortons brand
Goodwill [Line Items]
Goodwill	4,377	4,279
Burger King brand
Goodwill [Line Items]
Goodwill	608	614
Popeyes brand
Goodwill [Line Items]
Goodwill	846	846
Trade names
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets:	10,319	10,179
Trade names | Tim Hortons brand
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets:	6,811	6,650
Trade names | Burger King brand
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets:	2,153	2,174
Trade names | Popeyes brand
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets:	1,355	1,355
Franchise agreements
Finite-Lived Intangible Assets [Line Items]
Gross	733	735
Accumulated Amortization	(278)	(264)
Net	455	471
Favorable leases
Finite-Lived Intangible Assets [Line Items]
Gross	110	117
Accumulated Amortization	(64)	(66)
Net	$ 46	$ 51