Leases - Assets leased to franchises (Details) $ in Millions	Mar. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Property and equipment leased, gross	$ 2,057
Accumulated depreciation and amortization	(415)
Property and equipment leased, net	1,642
Land
Property, Plant and Equipment [Line Items]
Property and equipment leased, gross	912
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property and equipment leased, gross	1,127
Restaurant equipment
Property, Plant and Equipment [Line Items]
Property and equipment leased, gross	$ 18