XML 108 R95.htm IDEA: XBRL DOCUMENT
v3.20.4

Contingent Liabilities and Other Matters - Environmental Matters (Details) - Site investigation and remediation - site | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Environmental Matters |  |
Number of sites | 25 | 29
Number of third-party disposal sites for which entity is potentially responsible | 11 | 14
Number of active sites | 9 |

X
- Definition Represents the number of offsite, third-party disposal sites which have been active in the past few years. + References No definition available. + Details
Name: | spxc_SiteContingencyNumberOfActiveSites
Namespace Prefix: | spxc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of sites which have liabilities for site investigation and remediation. + References No definition available. + Details
Name: | spxc_SiteContingencyNumberOfSites
Namespace Prefix: | spxc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of offsite, third-party disposal sites for which the entity is potentially responsible and have received notices of potential liability pursuant to various environmental laws. + References No definition available. + Details
Name: | spxc_SiteContingencyNumberOfSitesOnWhichEntityPotentiallyResponsible
Namespace Prefix: | spxc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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_SiteContingencyLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_EnvironmentalRemediationContingencyAxis=us-gaap_EnvironmentalIssueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |