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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

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Namespace Prefix:	sjm_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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