XML 55 R45.htm IDEA: XBRL DOCUMENT v3.21.1

REVENUES FROM CONTRACTS - Narrative (Details) $ in Millions	3 Months Ended
	Apr. 03, 2021 USD ($)
Revenue from External Customer [Line Items]
Increase (decrease) in contract with customers, net	$ (42.4)
Contract with customer, revenue recognized	$ 46.3

X

- Definition

Increase (Decrease) in Contract with Customers, Net

+ References

No definition available.

+ Details

Name:	spxc_IncreaseDecreaseinContractwithCustomersNet
Namespace Prefix:	spxc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

+ Details

Name:	us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_EntityWideInformationRevenueFromExternalCustomerLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration