Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
Mar. 29, 2015	Mar. 30, 2014
OPERATING ACTIVITIES:
Net earnings including noncontrolling interests	$ 1,480.4us-gaap_ProfitLoss	$ 967.6us-gaap_ProfitLoss
Adjustments to reconcile net earnings to net cash provided/(used) by operating activities:
Depreciation and amortization	444.2	364.2
Deferred income taxes, net	60.0us-gaap_DeferredIncomeTaxExpenseBenefit	36.1us-gaap_DeferredIncomeTaxExpenseBenefit
Income earned from equity method investees	(76.9)	(69.0)
Distributions received from equity method investees	57.9	48.2
Gain resulting from acquisition of joint venture	(390.6)	0
Stock-based compensation	104.2us-gaap_ShareBasedCompensation	91.6us-gaap_ShareBasedCompensation
Excess tax benefit on share-based awards	(78.0)	(87.3)
Other	27.7us-gaap_OtherNoncashIncomeExpense	11.4us-gaap_OtherNoncashIncomeExpense
Cash provided/(used) by changes in operating assets and liabilities:
Accounts receivable	(14.1)	(28.6)
Inventories	39.6us-gaap_IncreaseDecreaseInInventories	156.2us-gaap_IncreaseDecreaseInInventories
Accounts payable	48.2	(9.6)
Accrued litigation charge	0us-gaap_PaymentsForLegalSettlements	(2,763.9)us-gaap_PaymentsForLegalSettlements
Income taxes payable, net	(56.5)	128.4
Accrued liabilities and insurance reserves	121.9	13.1
Deferred revenue	200.1	162.5
Prepaid expenses, other current assets and other assets	32.8	(4.4)
Net cash provided/(used) by operating activities	2,000.9	(983.5)
INVESTING ACTIVITIES:
Purchase of investments	(282.0)us-gaap_PaymentsToAcquireInvestments	(974.9)us-gaap_PaymentsToAcquireInvestments
Sales of investments	305.3	574.3
Maturities and calls of investments	12.7	369.6
Acquisitions, net of cash acquired	(284.3)	0
Additions to property, plant and equipment	(606.6)	(503.6)
Other	(17.9)	(14.4)
Net cash used by investing activities	(872.8)	(549.0)
FINANCING ACTIVITIES:
Proceeds from issuance of long-term debt	0	748.5
Cash used for purchase of noncontrolling interest	(257.6)us-gaap_PaymentsToMinorityShareholders	0us-gaap_PaymentsToMinorityShareholders
Proceeds from issuance of common stock	111.1	89.5
Excess tax benefit on share-based awards	78.0	87.3
Cash dividends paid	(479.6)us-gaap_PaymentsOfDividends	(392.3)us-gaap_PaymentsOfDividends
Repurchase of common stock	(346.4)	(290.1)
Minimum tax withholdings on share-based awards	(73.2)	(76.0)
Other	(7.7)	(9.5)
Net cash (used)/provided by financing activities	(975.4)	157.4
Effect of exchange rate changes on cash and cash equivalents	(110.7)	(10.3)
Net increase/(decrease) in cash and cash equivalents	42.0	(1,385.4)
CASH AND CASH EQUIVALENTS:
Beginning of period	1,708.4	2,575.7
End of period	1,750.4	1,190.3
Cash paid during the period for:
Interest, net of capitalized interest	36.9us-gaap_InterestPaidNet	17.4us-gaap_InterestPaidNet
Income taxes, net of refunds	$ 612.8us-gaap_IncomeTaxesPaidNet	$ 314.8us-gaap_IncomeTaxesPaidNet

Name:	sbux_CashPaidDuringPeriodForAbstract
Namespace Prefix:	sbux_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. Excluded from this line item is our proportionate share of gross profit resulting from coffee and other product sales to, and royalty and license fee revenues generated from, equity investees.