Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended					12 Months Ended
	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Description of immaterial error correction	Effective at the beginning of fiscal 2014, we reclassified certain fees related to our US and Seattle's Best Coffee foodservice operations in our Channel Development segment and All Other Segments, respectively, from other operating expenses to foodservice revenues included in CPG, foodservice and other net revenues in our consolidated statements of earnings. This reclassification results from a correction of an error in our prior period financial statements which we have determined to be immaterial.
Reclassification resulting from an immaterial error					$ 6.4	$ 25.4	$ 22.7
Company-operated stores	3,343.8	3,009.6	2,986.3	2,807.7	2,989.6	11,793.2	10,534.5
Licensed stores	401.8	346.3	342.0	322.1	350.2	1,360.5	1,210.3
CPG, foodservice and other	494.0	432.9	407.0	419.8	453.4	1,713.1	1,532.0
Total net revenues	4,239.6	3,788.8	3,735.3	3,549.6	3,793.2	14,866.8	13,276.8
Cost of sales including occupancy costs	1,795.1	1,633.7	1,597.6	1,530.4	1,620.7	6,382.3	5,813.3
Store operating expenses	1,175.1	1,073.9	1,084.1	1,038.4	1,089.5	4,286.1	3,918.1
Other operating expenses	114.9	101.1	98.9	105.8	126.1	431.8	407.2
Depreciation and amortization expenses	169.7	166.1	153.3	153.1	148.9	621.4	550.3
General and administrative expenses	242.6	226.1	249.6	230.3	231.9	937.9	801.2
Litigation charge/(credit)	(20.2)	2,784.1	0	0	0	2,784.1	0
Total operating expenses	3,477.2	5,985.0	3,183.5	3,058.0	3,217.1	15,443.6	11,490.1
Income from equity investees	51.1	81.0	63.4	52.5	54.5	251.4	210.7
Operating income	813.5	(2,115.2)	615.2	544.1	630.6	(325.4)	1,997.4
Interest income and other, net	19.8	72.1	3.5	50.8	(2.9)	123.6	94.4
Interest expense	(14.5)	(9.1)	(6.3)	(6.1)	(6.6)	(28.1)	(32.7)
Earnings before income taxes	818.8	(2,052.2)	612.4	588.8	621.1	(229.9)	2,059.1
Income taxes	278.1	(820.1)	194.6	198.1	188.7	(238.7)	674.4
Net earnings including noncontrolling interests	540.7	(1,232.1)	417.8	390.7	432.4	8.8	1,384.7
Comprehensive income attributable to noncontrolling interests	0	(0.1)	0	0.3	0.2	0.5	0.9
Net earnings attributable to Starbucks	$ 540.7	$ (1,232.0)	$ 417.8	$ 390.4	$ 432.2	$ 8.3	$ 1,383.8
Current Fiscal Year End Date	--09-28