Segment Reporting and Geographical Information - Schedule of Segment Related Assets and Long Lived Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Jan. 01, 2018
Long Lived Assets Held-for-sale [Line Items]
Assets	$ 22,360	$ 21,177	$ 20,141	$ 21,308
Long-Lived Assets	3,231		2,050
Canada
Long Lived Assets Held-for-sale [Line Items]
Long-Lived Assets	1,665		945
United States
Long Lived Assets Held-for-sale [Line Items]
Long-Lived Assets	1,542		1,098
Other
Long Lived Assets Held-for-sale [Line Items]
Long-Lived Assets	24		7
Operating segments | Tim Hortons
Long Lived Assets Held-for-sale [Line Items]
Assets	13,894		12,666
Long-Lived Assets	1,972		1,226
Operating segments | Burger King
Long Lived Assets Held-for-sale [Line Items]
Assets	5,149		4,514
Long-Lived Assets	1,130		729
Operating segments | Popeyes
Long Lived Assets Held-for-sale [Line Items]
Assets	2,490		2,420
Long-Lived Assets	129		95
Unallocated
Long Lived Assets Held-for-sale [Line Items]
Assets	827		541
Long-Lived Assets	$ 0		$ 0