Acquisition (Narrative) (Details) In Millions, unless otherwise specified	3 Months Ended		0 Months Ended			2 Months Ended	3 Months Ended							0 Months Ended			12 Months Ended			0 Months Ended
	Dec. 28, 2014 USD ($)	Dec. 29, 2013 USD ($)	Dec. 28, 2014 Starbucks Coffee Japan Ltd Member USD ($)	Oct. 31, 2014 Starbucks Coffee Japan Ltd Member USD ($)	Oct. 31, 2014 Starbucks Coffee Japan Ltd Member JPY (¥)	Dec. 28, 2014 Starbucks Coffee Japan Ltd Member USD ($)	Dec. 28, 2014 Starbucks Coffee Japan Ltd Member USD ($)	Dec. 29, 2013 Starbucks Coffee Japan Ltd Member USD ($)		Dec. 29, 2014 Starbucks Coffee Japan Ltd Member	Oct. 31, 2014 Starbucks Coffee Japan Ltd Member USD ($)	Oct. 26, 2014 Starbucks Coffee Japan Ltd Member	Sep. 28, 2014 Starbucks Coffee Japan Ltd Member	Oct. 31, 2014 Starbucks Coffee Japan Ltd Member Reacquired Rights USD ($)	Oct. 31, 2014 Starbucks Coffee Japan Ltd Member Licensing Agreements USD ($)	Oct. 31, 2014 Starbucks Coffee Japan Ltd Member Customer Loyalty Program USD ($)	Sep. 27, 2015 Starbucks Coffee Japan Ltd Member Scenario, Forecast [Member] USD ($)	Sep. 27, 2015 Starbucks Coffee Japan Ltd Member Scenario, Forecast [Member] JPY (¥)	Jan. 27, 2015 Starbucks Coffee Japan Ltd Member Scenario, Forecast [Member]	Dec. 29, 2014 Subsequent Event [Member] Starbucks Coffee Japan Ltd Member USD ($)	Dec. 29, 2014 Subsequent Event [Member] Starbucks Coffee Japan Ltd Member JPY (¥)	Dec. 29, 2014 Subsequent Event [Member] Starbucks Coffee Japan Ltd Member
Business Acquisition [Line Items]
Preexisting ownership percentage in Starbucks Japan													39.50%
Remaining Ownership Interest in Equity Method Investee to be Acquired													60.50%
Reason for acquisition							Acquiring Starbucks Japan further leverages our existing infrastructure to continue disciplined retail store growth and expand our presence into other channels in the Japan market, such as consumer packaged goods ("CPG"), licensing and foodservice
Additional ownership interest in Starbucks Japan acquired											39.50%											14.70%
Cash paid to acquire additional ownership interest in Starbucks Japan				$ 508.7	¥ 55,000.0												$ 115.0	¥ 13,500.0		$ 258.0	¥ 31,000.0
Total ownership interest in Starbucks Japan acquired through first tender offer step											79.00%
Remaining interest of minority shareholders' to be acquired						21.00%	21.00%			6.30%
Ownership interest after conclusion of Cash-out procedure																	100.00%	100.00%
Reference conversion rate												108.13							117.58			120.39
Acquisition-related costs incurred							11
Acquisition date				Oct. 31, 2014	Oct. 31, 2014
Definite-lived intangible assets acquired														305.0	15.0	3.0
Definite-lived intangible assets, life (years)														6 years 5 months	10 years 11 months	4 years 0 months
Definite-lived intangible assets, effect of foreign currency translation						32.9
Definite-lived intangible assets, amortization expense							7.7
Acquired definite-lived intangible assets, amortization expense, next twelve months						45	45
Acquired definite-lived intangible assets, amortization expense, year two						45	45
Acquired definite-lived intangible assets, amortization expense, year three						45	45
Acquired definite-lived intangible assets, amortization expense, year four						45	45
Acquired definite-lived intangible assets, amortization expense, year five						45	45
Acquired definite-lived intangible assets, amortization expense, after year five						58	58
Goodwill			732.6	815.6
Goodwill description				the intangible assets that do not qualify for separate recognition and primarily includes the acquired current customer base, the acquired workforce including store partners in the region that have strong relationships with these customers, the existing geographic retail and online presence, and the expected geographic presence in new channels	the intangible assets that do not qualify for separate recognition and primarily includes the acquired current customer base, the acquired workforce including store partners in the region that have strong relationships with these customers, the existing geographic retail and online presence, and the expected geographic presence in new channels
Goodwill, effect of foreign currency translation							83.0
Favorable lease assets acquired											7.5
Unfavorable lease liabilities assumed											15.5
Favorable lease assets and unfavorable lease liabilities, weighted average remaining term (years)				9 years 5 months	9 years 5 months
Unfavorable/favorable leases, rent expense/(reduction)							(0.2)
Gain resulting from acquisition of joint venture	390.6	0					390.6
Fair value of preexisting equity interest				577.0
Starbucks Japan revenue included in consolidated statements of earnings							192.8
Starbucks Japan net earnings included in consolidated statements of earnings							20.3
Pro forma revenue							4,895.0	4,526.7
Pro forma net earnings attributable to Starbucks							600.3	921.1	[1]
Transaction and integration costs							$ 11.6

[1] The pro forma net earnings attributable to Starbucks for the first quarter of fiscal 2014 included the acquisition-related gain of $390.6 million and $11.6 million of transaction and integration costs.