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Document and Entity Information
Mar. 26, 2021
Cover [Abstract]  
Entity Registrant Name SPX CORP
Amendment Flag false
Entity Central Index Key 0000088205
Document Type 8-K
Document Period End Date Mar. 26, 2021
Entity Incorporation State Country Code DE
Entity File Number 1-6948
Entity Tax Identification Number 38-1016240
Entity Address, Address Line One 6325 Ardrey Kell Road
Entity Address, Address Line Two Suite 400
Entity Address, City or Town Charlotte
Entity Address, State or Province NC
Entity Address, Postal Zip Code 28277
City Area Code (980)
Local Phone Number 474-3700
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, par value $0.01
Trading Symbol SPXC
Security Exchange Name NYSE
Entity Emerging Growth Company false