Revenue Recognition - Disaggregation of total revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Property revenues	$ 158	$ 214	$ 336	$ 413
Total revenues	1,048	1,400	2,273	2,666
Sales
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Revenues	406	589	909	1,111
Royalties
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Revenues	469	576	995	1,104
Franchise fees and other revenue
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Revenues	$ 15	$ 21	$ 33	$ 38