Segment Reporting - Revenues by Operating Segment and Country (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue, Major Customer [Line Items]
Total revenues	$ 1,048	$ 1,400	$ 2,273	$ 2,666
Canada
Revenue, Major Customer [Line Items]
Total revenues	514	764	1,146	1,440
United States
Revenue, Major Customer [Line Items]
Total revenues	443	479	893	923
Other
Revenue, Major Customer [Line Items]
Total revenues	91	157	234	303
Tim Hortons brand
Revenue, Major Customer [Line Items]
Total revenues	567	842	1,266	1,591
Burger King brand
Revenue, Major Customer [Line Items]
Total revenues	347	447	735	858
Popeyes brand
Revenue, Major Customer [Line Items]
Total revenues	$ 134	$ 111	$ 272	$ 217