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Summary of Significant Accounting Policies Reclassification (Details) - USD ($) $ in Millions | 12 Months Ended
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Sep. 29, 2024 | Oct. 01, 2023 | Oct. 02, 2022
Reclassifications [Abstract] |  |  |
Store Occupancy Cost | $ 3,050.6 | $ 2,871.0 | $ 2,674.1

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- Definition Reclassifications [Abstract] + References No definition available. + Details
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Namespace Prefix: | sbux_
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Balance Type: | na
Period Type: | duration

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- Definition costs specifically related to store occupancy + References No definition available. + Details
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Namespace Prefix: | sbux_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration