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Segment Information (Schedule of Segment Reporting - Capital Expenditures) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Nov. 02, 2025 | Oct. 27, 2024
Segment Reporting Information [Line Items] |  |  |
Segment Expenditure, Addition to PP&E |  | $ 127 | $ 110
Meals & Beverages [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Expenditure, Addition to PP&E |  | 71 | 34
Snacks [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Expenditure, Addition to PP&E |  | 43 | 46
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Segment Expenditure, Addition to PP&E | [1] | $ 13 | $ 30
[1] | Represents primarily corporate offices and enterprise-wide information technology systems.

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- Definition Amount of expenditure for addition to long-lived assets. Excludes expenditure for addition to financial instrument, long-term customer relationship of financial institution, mortgage and other servicing rights, deferred policy acquisition cost, and deferred tax assets. + References No definition available. + Details
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Namespace Prefix: | cpb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |