Leases (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 27, 2014 Years	Dec. 28, 2013	Dec. 29, 2012
Leases [Abstract]
Approximate number of restaurants operated	8,700
Approximate number of restaurants operated on leased land and/or buildings	7,775
Maximum duration of lease commitments from inception for the vast majority of our lease commitments (in years)	20
Capital leases, future minimum commitments [Abstract]
2015	$ 20
2016	21
2017	20
2018	20
2019	20
Thereafter	181
Capital leases, total future minimum commitments	282
Operating leases, future minimum commitments [Abstract]
2015	709
2016	661
2016	609
2017	555
2018	501
Thereafter	2,444
Operating leases, total future minimum commitments	5,479
Direct financing leases, lease receivables [Abstract]
2015	2
2016	2
2017	2
2018	2
2019	1
Thereafter	4
Direct financing leases, total lease receivables	13
Operating leases, lease receivables [Abstract]
2015	56
2016	52
2017	47
2018	44
2019	38
Thereafter	116
Operating leases, total lease receivables	353
Present value of minimum payments under capital leases	175	172
Unearned income associated with direct financing lease receivables	3
Rental expense
Minimum	766	759	721
Contingent	302	293	290
Total rental expense	1,068	1,052	1,011
Rental income	$ 103	$ 94	$ 77
Approximate number of units leased or subleased to franchisees	875