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Capital Stock Shares Outstanding (Tables) | 12 Months Ended
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Sep. 29, 2024
Shares Outstanding [Abstract] |
Schedule of Capital Units [Table Text Block] | Shares Outstanding. Shares of common stock outstanding at September 29, 2024 were as follows (in millions):
Balance at beginning of period | 1,114 |
Issued | 24 |
Repurchased | (25) |
| 1,113

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- Definition Shares Outstanding [Abstract] + References No definition available. + Details
Name: | qcom_SharesOutstandingAbstract
Namespace Prefix: | qcom_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Tabular disclosure of an entity's capital units or capital shares, including the value of capital units or capital shares, units authorized, units outstanding and other information necessary to a fair presentation. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCapitalUnitsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration