Name:	seb_InventoryFreshPorkAndMaterialsBeforeLIFOAdjustmentNetOfReserve
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Carrying amount, net of valuation reserve and adjustment, as of the balance sheet date of grains and oilseeds.

No definition available.

Name:	seb_InventoryGrainsAndOilseedsNetOfReserves
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Period Type:	instant

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date, of live hogs and materials, before LIFO adjustment.

No definition available.

Name:	seb_InventoryLiveHogsAndMaterialsBeforeLIFOAdjustmentNetOfReserve
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Period Type:	instant

Carrying amount, net of valuation reserve and adjustment, as of the balance sheet date of sugar produced and in process.

No definition available.

Name:	seb_InventorySugarProducedAndInProcessNetOfReserves
Namespace Prefix:	seb_
Data Type:	xbrli:monetaryItemType
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The amount of LIFO (last in first out) inventory, net of valuation reserve and adjustment, before LIFO adjustment.

No definition available.

Name:	seb_LIFOInventoryBeforeLIFOAdjustmentNetOfReserve
Namespace Prefix:	seb_
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- Details

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- Details

Name:	seb_LowerOfLIFOCostOrMarketAbstract
Namespace Prefix:	seb_
Data Type:	xbrli:stringItemType
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The amount of FIFO (first in first out) inventory present at the reporting date when inventory is also valued using different valuation methods.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766

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Amount of difference between inventory at lower of LIFO cost or market and inventory at lower of other inventory accounting method cost or market, for example, but not limited to, FIFO or average cost.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 330

-SubTopic 10

-Section 35

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6386567&loc=d3e3927-108312

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765

Name:	us-gaap_InventoryNet
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The amount of LIFO (last in first out) inventory present at the reporting date when inventory is also valued using different valuation methods.

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Carrying amount, net of valuation reserves and allowances, as of the balance sheet date of inventories not otherwise specified in the taxonomy.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 330

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.BB)

-URI http://asc.fasb.org/extlink&oid=27011343&loc=d3e100047-122729

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 6

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_OtherInventoryNetOfReserves
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The amount of weighted average cost inventory present at the reporting date when inventory is valued using different valuation methods.