XML 78 R59.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Segment Information - Power Segment (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) segment | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Segment Information |  |  |
Number of reportable segments | segment | 6 |  |
Interest income recorded for interest recognized on certain customer receivable balances | $ 15 | $ 15 | $ 40
Power | Accounts Receivable |  |  |
Segment Information |  |  |
Interest income recorded for interest recognized on certain customer receivable balances |  |  | $ 31

X
- Definition Interest income amount of which the earnings reflect the time value of money or transactions in which the payments are for the use or forbearance of money. Interest income includes amortization of premiums and accretion of discounts to maturity. + References No definition available. + Details
Name: | seb_InvestmentIncomeInterestIncludingAccretionOrAmortizationOfDiscountOrPremium
Namespace Prefix: | seb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=seb_PowerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_AccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |