XML 32 R101.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

Contingent Liabilities and Other Matters - Executive Agreements (Details) - Executive officers	12 Months Ended
	Dec. 31, 2019 executive_officer
Executive Agreements
Period of rolling term of employment agreements	1 year
Number of executive officers with severance benefit agreements	6

X

- References

No definition available.

+ Details

Name:	spxc_ExecutiveAgreementsAbstract
Namespace Prefix:	spxc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the period of rolling term of employment agreements.

+ References

No definition available.

+ Details

Name:	spxc_PeriodOfRollingTermOfEmploymentAgreements
Namespace Prefix:	spxc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Supplemental Unemployment Benefits, Number of Individuals with Severance Benefit Agreements

+ References

No definition available.

+ Details

Name:	spxc_SupplementalUnemploymentBenefitsNumberofIndividualswithSeveranceBenefitAgreements
Namespace Prefix:	spxc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	srt_TitleOfIndividualAxis=srt_ExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: