Revenue Recognition - Change in contract liabilities (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($)
Change In Contract With Customer Liability [Roll Forward]
Beginning balance	$ 541
Recognized during period and included in the contract liability balance at the beginning of the year	(59)
Increase, excluding amounts recognized as revenue during the period	29
Impact of foreign currency translation	6
Ending balance	517
Tim Hortons
Change In Contract With Customer Liability [Roll Forward]
Beginning balance	64
Recognized during period and included in the contract liability balance at the beginning of the year	(7)
Increase, excluding amounts recognized as revenue during the period	5
Impact of foreign currency translation	(1)
Ending balance	61
Burger King
Change In Contract With Customer Liability [Roll Forward]
Beginning balance	449
Recognized during period and included in the contract liability balance at the beginning of the year	(50)
Increase, excluding amounts recognized as revenue during the period	15
Impact of foreign currency translation	7
Ending balance	421
Popeyes
Change In Contract With Customer Liability [Roll Forward]
Beginning balance	28
Recognized during period and included in the contract liability balance at the beginning of the year	(2)
Increase, excluding amounts recognized as revenue during the period	9
Impact of foreign currency translation	0
Ending balance	$ 35