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Earnings Per Share (Tables) | 12 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Calculation of Net Earnings Per Common Share (EPS) - Basic and Diluted | Calculation of net earnings per common share (“EPS”) — basic and diluted (in millions, except EPS):
Fiscal Year Ended | Sep 30, 2018 |  | Oct 1, 2017 |  | Oct 2, 2016
Net earnings attributable to Starbucks | $ | 4,518.3 |  |  | $ | 2,884.7 |  |  | $ | 2,817.7 |
Weighted average common shares outstanding (for basic calculation) | 1,382.7 |  |  | 1,449.5 |  |  | 1,471.6 |
Dilutive effect of outstanding common stock options and RSUs | 11.9 |  |  | 12.0 |  |  | 15.1 |
Weighted average common and common equivalent shares outstanding (for diluted calculation) | 1,394.6 |  |  | 1,461.5 |  |  | 1,486.7 |
EPS — basic | $ | 3.27 |  |  | $ | 1.99 |  |  | $ | 1.91 |
EPS — diluted | $ | 3.24 |  |  | $ | 1.97 |  |  | $ | 1.90 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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