Equity (Components Of Accumulated Other Comprehensive Income, Net Of Tax) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 26, 2016	Jun. 28, 2015	Jun. 26, 2016	Jun. 28, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net gains/(losses) in AOCI at beginning of period			$ (199.4)
Other comprehensive income/(loss)	$ 60.6	$ (14.2)	70.8	$ (156.4)
Net gains/(losses) in AOCI at end of period	(128.6)		(128.6)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net gains/(losses) in AOCI at beginning of period	(189.2)	(116.9)	(199.4)	25.3
Net gains/(losses) recognized in OCI before reclassifications	16.5	13.0	8.5	(59.1)
Net (gains)/losses reclassified from AOCI to earnings	44.1	(27.2)	62.3	(66.2)
Other comprehensive income/(loss)	60.6	(14.2)	70.8	(125.3)
Purchase of noncontrolling interests				(31.1)
Net gains/(losses) in AOCI at end of period	(128.6)	(131.1)	(128.6)	(131.1)
Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net gains/(losses) in AOCI at beginning of period	2.9	0.4	(0.1)	(0.4)
Net gains/(losses) recognized in OCI before reclassifications	(2.6)	(1.1)	0.4	0.2
Net (gains)/losses reclassified from AOCI to earnings	(0.6)	(0.5)	(0.6)	(1.0)
Other comprehensive income/(loss)	(3.2)	(1.6)	(0.2)	(0.8)
Purchase of noncontrolling interests				0.0
Net gains/(losses) in AOCI at end of period	(0.3)	(1.2)	(0.3)	(1.2)
Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net gains/(losses) in AOCI at beginning of period	(3.8)	46.6	25.6	46.3
Net gains/(losses) recognized in OCI before reclassifications	(35.6)	25.1	(83.2)	73.6
Net (gains)/losses reclassified from AOCI to earnings	44.7	(26.7)	62.9	(74.9)
Other comprehensive income/(loss)	9.1	(1.6)	(20.3)	(1.3)
Purchase of noncontrolling interests				0.0
Net gains/(losses) in AOCI at end of period	5.3	45.0	5.3	45.0
Net Investment Hedging [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net gains/(losses) in AOCI at beginning of period	1.3	1.3	1.3	3.2
Net gains/(losses) recognized in OCI before reclassifications	0.0	0.0	0.0	2.7
Net (gains)/losses reclassified from AOCI to earnings	0.0	0.0	0.0	(4.6)
Other comprehensive income/(loss)	0.0	0.0	0.0	(1.9)
Purchase of noncontrolling interests				0.0
Net gains/(losses) in AOCI at end of period	1.3	1.3	1.3	1.3
Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net gains/(losses) in AOCI at beginning of period	(189.6)	(165.2)	(226.2)	(23.8)
Net gains/(losses) recognized in OCI before reclassifications	54.7	(11.0)	91.3	(135.6)
Net (gains)/losses reclassified from AOCI to earnings	0.0	0.0	0.0	14.3
Other comprehensive income/(loss)	54.7	(11.0)	91.3	(121.3)
Purchase of noncontrolling interests				(31.1)
Net gains/(losses) in AOCI at end of period	$ (134.9)	$ (176.2)	$ (134.9)	$ (176.2)

Impact to accumulated other comprehensive income due to the purchase of noncontrolling interest

No definition available.

Name:	sbux_Impacttoaccumulatedothercomprehensiveincomefrompurchaseofnoncontrollinginterest
Namespace Prefix:	sbux_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e681-108580

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580

+ Details

Name:	us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount after tax, before reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=66004921&loc=d3e1436-108581

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580

+ Details

Name:	us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669619-108580

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669625-108580

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=66004921&loc=d3e1436-108581

+ Details

Name:	us-gaap_OtherComprehensiveIncomeLossNetOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount after tax of reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=66004921&loc=d3e1436-108581

+ Details

Name:	us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_ParentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AvailableforsaleSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_NetInvestmentHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedTranslationAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: