XML 93 R81.htm IDEA: XBRL DOCUMENT
v3.22.4

Employee Benefit Plans - Defined Benefit Pension Plans Narrative (Details) - USD ($) $ in Millions |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 17, 2022 | Dec. 31, 2022 | Oct. 01, 2022 | Jul. 02, 2022 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Employee benefit plans |  |  |  |  |  |  |  |
Common stock held by defined benefit pension plans (in shares) |  | 0 |  |  | 0 | 0 | 0 |
Actuarial gains |  | $ 8.0 | $ (2.4) | $ (3.8) | $ 9.9 |  |  |
SPX Postretirement Plans |  |  |  |  |  |  |  |
Employee benefit plans |  |  |  |  |  |  |  |
Defined benefit plan, benefit obligation, loss on settlement |  |  |  |  |  | $ 0.7 |  |
Transfer to insurance carrier for cash consideration | $ 10.0 |  |  |  |  |  |  |
Actuarial gains |  |  |  |  |  | $ 0.4 |  |
United States |  |  |  |  |  |  |  |
Employee benefit plans |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  | 3.99% | 2.35% | 3.16%
United States | Pension plans |  |  |  |  |  |  |  |
Employee benefit plans |  |  |  |  |  |  |  |
Accumulated benefit obligation |  | $ 246.9 |  |  | $ 335.4 | $ 246.9 | $ 335.4 |
Actuarial gains |  |  |  |  |  | $ 66.4 | $ 12.9 |

X
- Definition Defined Benefit Plan, Benefit Obligation, Consideration Paid to Carrier + References No definition available. + Details
Name: | spxc_DefinedBenefitPlanBenefitObligationConsiderationPaidToCarrier
Namespace Prefix: | spxc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Defined Benefit Plan, Benefit Obligation, Loss on Settlement + References No definition available. + Details
Name: | spxc_DefinedBenefitPlanBenefitObligationLossOnSettlement
Namespace Prefix: | spxc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of common stock held in a trust that has been set up specifically to accumulate stock for the sole purpose of distribution to participating employees but not yet earned. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 25 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=109244457&loc=d3e16701-113920 + Details
Name: | us-gaap_CommonStockSharesHeldInEmployeeTrustShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanActuarialGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
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_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanNameAxis=spxc_SPXPostretirementPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |