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Composition of Certain Financial Statement Items Discontinued Operations (Details) - USD ($) $ in Billions | Apr. 01, 2022 | Jun. 01, 2023
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Veoneer |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Payments to acquire business including debt assumed | $ 4.7 |
Veoneer's Active Safety [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Disposal Group, Including Discontinued Operation, Consideration |  | $ 1.5

X
- Definition Cumulative cash outflow associated with the acquisition of business and the amount of debt assumed at the acquisition date. + References No definition available. + Details
Name: | qcom_PaymentsToAcquireBusinessIncludingDebtAssumed
Namespace Prefix: | qcom_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=qcom_VeoneerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=qcom_VeoneersActiveSafetyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |