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Derivative Financial Instruments (Details) - USD ($) $ in Millions | Jan. 31, 2022 | Apr. 30, 2021
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Commodity contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gross notional amount | $ 969.1 | $ 861.0
Foreign currency exchange contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Gross notional amount | $ 85.6 | $ 88.4

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- Definition Nominal or face amount used to calculate payment on derivative. + References No definition available. + Details
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Namespace Prefix: | sjm_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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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
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |