Inventories (Components of Inventory) (Details) - USD ($) $ in Millions	Jun. 28, 2015	Sep. 28, 2014	Jun. 29, 2014
Inventory Disclosure [Abstract]
Unroasted coffee	$ 529.5	$ 432.3	$ 442.3
Roasted coffee	240.6	238.9	215.1
Other merchandise held for sale	226.2	265.7	213.8
Packaging and other supplies	169.7	154.0	154.6
Total	$ 1,166.0	$ 1,090.9	$ 1,025.8