XML 57 R47.htm IDEA: XBRL DOCUMENT v3.19.1

LEASES (Details)	3 Months Ended
	Mar. 30, 2019
Lessee, Lease, Description [Line Items]
Option to terminate (years)	1 year
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term (years)	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term (years)	10 years
Option to extend (years)	5 years

X

- Definition

Lease, Remaining Lease Term

+ References

No definition available.

+ Details

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

X

- Definition

Lessee, Lease, Renewal Term

+ References

No definition available.

+ Details

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

X

- Definition

Lessee, Lease, Termination Period

+ References

No definition available.

+ Details

Name:	spxc_LesseeLeaseTerminationPeriod
Namespace Prefix:	spxc_
Data Type:	xbrli:durationItemType
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_LesseeLeaseDescriptionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: