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Derivative Financial Instruments (Details 4) - USD ($) $ in Millions | Apr. 30, 2015 | Feb. 02, 2015 | Apr. 30, 2014
--- | --- | --- | ---
Commodity contracts [Member] |  |  |
Outstanding derivative contracts |  |  |
Gross contract notional amount | $ 640.6 |  | $ 790.3
Foreign currency exchange contracts [Member] |  |  |
Outstanding derivative contracts |  |  |
Gross contract notional amount | 136.4 |  | 158.1
Interest rate contract [Member] |  |  |
Outstanding derivative contracts |  |  |
Gross contract notional amount | $ 0.0 | $ 1,100.0 | $ 750.0

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- Definition Aggregate notional amount specified by the derivative(s). + References No definition available. + Details
Name: | sjm_DerivativeNotionalAmount1
Namespace Prefix: | sjm_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_NotionalAmountOfDerivativesAbstract
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: |

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