Intangible Assets - Amortization Expense (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) Years	Mar. 31, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization expense	$ 19	$ 19
The number of succeeding years for which amortization expense is disclosed | Years	4
Amortization expense for the remainder of the Year	$ 55
Amortization expense for Year Two	71
Amortization expense for Year Three	70
Amortization expense for Year Four	70
Amortization expense for Year Five	70
Amortization expense Thereafter	859
Amortizable—Franchise agreements (a)
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization expense	17	17
Amortizable—License agreements (d)
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization expense	0	0
Amortizable—Customer relationships (e)
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization expense	1	1
Amortizable—Other (g)
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization expense	$ 1	$ 1