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v3.22.4

Special Charges, Net - Narrative (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) employee | Dec. 31, 2021 USD ($) employee | Dec. 31, 2020 USD ($) employee
Special charges, net |  |  |
Special charges, net | $ | $ 0.4 | $ 1.0 | $ 2.4
Period for selling an asset | 1 year |  |
Period for settling liabilities | 1 year |  |
HVAC reportable segment | Employee Termination Costs |  |  |
Special charges, net |  |  |
Number of employees terminated | 2 | 6 | 11
Detection and Measurement reportable segment | Employee Termination Costs |  |  |
Special charges, net |  |  |
Number of employees terminated |  | 44 | 5

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- Definition Period within which the entity expects to sell an asset (in years) in order to qualify as a discontinued operation. + References No definition available. + Details
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Namespace Prefix: | spxc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the period within which the liabilities related to restructuring actions will be settled. + References No definition available. + Details
Name: | spxc_PeriodWithinWhichLiabilitiesWillBeSettled
Namespace Prefix: | spxc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount charged against earnings in the period for incurred and estimated costs associated with an exit from business activities or restructuring pursuant to a duly authorized plan, excluding asset retirement obligations. Such costs include charges associated with employee terminations, lease terminations, asset impairments, etc. + References No definition available. + Details
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Namespace Prefix: | spxc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The number of positions eliminated during the period as a result of restructuring activities. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
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Period Type: | duration

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |