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Accounting Policies and Basis of Presentation (Details) - USD ($) $ in Millions | 3 Months Ended
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Apr. 02, 2016 | Apr. 04, 2015
Supplemental Cash Flow Information [Abstract] |  |
Non-cash, pay-in-kind interest income and accretion of discount recognized on a note receivable from an affiliate | $ 1 | $ 4

X
- Definition Interest received other than in cash for example on a note receivable from an affiliate. As a noncash item, it is subtracted from net income when calculating cash provided by or used in operations using the indirect method. + References No definition available. + Details
Name: | seb_PaidInKindInterestIncome
Namespace Prefix: | seb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration