Basis Of Presentation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 27, 2014 store	Mar. 28, 2013	Mar. 27, 2014 store	Mar. 28, 2013
Basis Of Presentation [Line Items]
Number of stores	1,534		1,534
Excise and other taxes in fuel revenues and cost of goods sold	$ 185.5	$ 192.8	$ 380.8	$ 397.5
Inventory adjustment for fuel expansion variances	$ 14.3	$ 14.8	$ 14.3	$ 14.8
Quick Service Restaurant [Member]
Basis Of Presentation [Line Items]
Number of restaurants	224		224
Car Wash Facilities [Member]
Basis Of Presentation [Line Items]
Number of stores	238		238
Self-Service Fuel [Member]
Basis Of Presentation [Line Items]
Number of stores	1,522		1,522
Branded Fuel Stations [Member]
Basis Of Presentation [Line Items]
Number of stores	1,024		1,024