Accounting Policies and Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 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	$ 5	$ 2	$ 9

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.

No definition available.

Name:	seb_PaidInKindInterestIncome
Namespace Prefix:	seb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration