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Acquisitions, Discontinued Operations and Formation of Shanghai Electric JV (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 0 Months Ended
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Dec. 31, 2014 item | Dec. 31, 2013 item | Dec. 31, 2012 | Mar. 31, 2012 | Mar. 21, 2012
Acquisitions |  |  |  |  |
Number of acquisitions | 0 spw_NumberOfAcquisitions | 0 spw_NumberOfAcquisitions |  |  |
Purchase price of the business acquired |  | $ 2.9 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired | $ 34.3 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired |  |
Seital |  |  |  |  |
Acquisitions |  |  |  |  |
Revenues of the acquired business for the prior twelve months |  |  |  | 14.0 us-gaap_BusinessAcquisitionRevenueReportedByAcquiredEntityForLastAnnualPeriod / dei_LegalEntityAxis = spw_SeitalSrlMember |
Flow Technology Reportable Segment | Seital |  |  |  |  |
Acquisitions |  |  |  |  |
Purchase price of the business acquired |  |  |  |  | 28.8 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = spw_SeitalSrlMember / us-gaap_StatementBusinessSegmentsAxis = spw_FlowTechnologyMember
Cash acquired in business acquisition |  |  |  |  | 2.5 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = spw_SeitalSrlMember / us-gaap_StatementBusinessSegmentsAxis = spw_FlowTechnologyMember
Debt assumed in business acquisition |  |  |  |  | $ 0.8 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt / us-gaap_BusinessAcquisitionAxis = spw_SeitalSrlMember / us-gaap_StatementBusinessSegmentsAxis = spw_FlowTechnologyMember

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- Definition Represents the number of acquisitions made by the entity during the reporting period. + References No definition available. + Details
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- Definition Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition. + References No definition available. + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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