Leases (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) Years	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Approximate number of restaurants operated	856
Approximate number of restaurants operated on leased land and/or buildings	517
Maximum duration of lease commitments from inception for the vast majority of our lease commitments (in years) | Years	20
Capital leases, future minimum commitments [Abstract]
2016	$ 10
2017	10
2018	9
2019	8
2020	8
Thereafter	58
Capital leases, total future minimum commitments	103
Operating leases, future minimum commitments [Abstract]
2016	103
2017	89
2018	78
2019	71
2020	61
Thereafter	384
Operating leases, total future minimum commitments	786
Direct financing leases, lease receivables [Abstract]
2016	6
2017	5
2018	4
2019	4
2020	3
Thereafter	30
Direct financing leases, total lease receivables	52
Operating leases, lease receivables [Abstract]
2016	89
2017	79
2018	74
2019	69
2020	67
Thereafter	638
Operating leases, total lease receivables	1,016
Present value of minimum payments under capital leases	71	$ 105
Unearned income associated with direct financing lease receivables	19
Rental expense
Minimum	142	193	$ 208
Contingent	9	21	26
Total rental expense	151	214	234
Operating Leases, Income Statement, Lease Revenue	$ 131	$ 86	$ 73
Approximate number of units leased or subleased to franchisees	1,020
2019 [Member] | Accounting Standards Update 2016-02 [Member] | Liabilities, Lease Renewals [Member]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Total Liabilities	$ 50
2019 [Member] | Accounting Standards Update 2016-02 [Member] | Liabilities, Total [Member]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Total Liabilities	$ 750