Revenue Recognition - Disaggregation of total revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Property revenues	$ 196	$ 215	$ 532	$ 628
Total revenues	1,337	1,458	3,610	4,124
Sales
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Sales	541	624	1,450	1,735
Royalties
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Sales	581	602	1,576	1,706
Franchise fees and other revenue
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Sales	$ 19	$ 17	$ 52	$ 55