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FAIR VALUE MEASUREMENTS Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions	Jul. 31, 2011	May 01, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity Contracts, Asset, Fair Value Disclosure	$ 39.1	$ 79.8
Foreign Currency Contract, Asset, Fair Value Disclosure	1.1	0.5
Cash Surrender Value, Fair Value Disclosure	47.6	49.4
Assets, Fair Value Disclosure	87.8	129.7
Commodity Contracts, Liability, Fair Value Disclosure	21.9	16.8
Interest Rate Contracts, Liability, Fair Value Disclosure	0.6	2.3
Foreign Currency Contracts, Liability, Fair Value Disclosure	0.5	1.9
Liabilities, Fair Value Disclosure	23.0	21.0
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity Contracts, Asset, Fair Value Disclosure	20.0	45.2
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Cash Surrender Value, Fair Value Disclosure	47.6	49.4
Assets, Fair Value Disclosure	67.6	94.6
Commodity Contracts, Liability, Fair Value Disclosure	19.1	16.8
Interest Rate Contracts, Liability, Fair Value Disclosure	0	0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	19.1	16.8
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity Contracts, Asset, Fair Value Disclosure	19.1	34.6
Foreign Currency Contract, Asset, Fair Value Disclosure	1.1	0.5
Cash Surrender Value, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	20.2	35.1
Commodity Contracts, Liability, Fair Value Disclosure	2.8	0
Interest Rate Contracts, Liability, Fair Value Disclosure	0.6	2.3
Foreign Currency Contracts, Liability, Fair Value Disclosure	0.5	1.9
Liabilities, Fair Value Disclosure	3.9	4.2
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity Contracts, Asset, Fair Value Disclosure	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Cash Surrender Value, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	0	0
Commodity Contracts, Liability, Fair Value Disclosure	0	0
Interest Rate Contracts, Liability, Fair Value Disclosure	0	0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0	0
Liabilities, Fair Value Disclosure	$ 0	$ 0

X

- Definition

Commodity Contracts, Asset, Fair Value Disclosure

+ Details

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Namespace Prefix:	sfd
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Commodity Contracts, Liability, Fair Value Disclosure

+ Details

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Namespace Prefix:	sfd
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Definition

Interest Rate Contracts, Liability, Fair Value Disclosure

+ Details

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Namespace Prefix:	sfd
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This element represents the portion of a balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount that could be realized under a life insurance contract or contracts owned by the Company as of the date of the statement of financial position. Such Company-owned life insurance policies are commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 88-5
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Technical Bulletin (FTB)
-Number 85-4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Surrender Value
-URI http://asc.fasb.org/extlink&oid=6507153

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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.

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents contracts related to the exchange of different currencies, including foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into and existing as of the balance sheet date.

+ Details

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Namespace Prefix:	us-gaap
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Balance Type:	debit
Period Type:	instant

X

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents contracts related to the exchange of different currencies, including foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into and existing as of the balance sheet date.

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Namespace Prefix:	us-gaap
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Balance Type:	credit
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X

- Definition

This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ Details

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Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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