INDEBTEDNESS - Summary of Debt Activity (Details) - USD ($)	9 Months Ended
	Oct. 01, 2022	Aug. 12, 2022	Dec. 31, 2021
Debt
Balance at the beginning of the period	$ 246,000,000.0
Borrowings	245,100,000
Repayments	(244,500,000)
Other	300,000
Balance at the end of the period	246,900,000
Less: short-term debt	1,900,000		$ 2,200,000
Less: current maturities of long-term debt	400,000		13,000,000.0
Long-term debt	244,600,000		230,800,000
Trade receivables financing arrangement
Debt
Balance at the beginning of the period	0
Borrowings	0
Repayments	0
Other	0
Balance at the end of the period	0
Maximum borrowing capacity under financing arrangement	50,000,000.0
Amount of available borrowing capacity	30,300,000
Other indebtedness
Debt
Balance at the beginning of the period	3,300,000
Borrowings	100,000
Repayments	(800,000)
Other	0
Balance at the end of the period	2,600,000
Purchase card programs	1,900,000		2,200,000
Finance lease, liability	700,000		1,100,000
Revolving loans | Current Revolving SPX Facilities
Debt
Balance at the beginning of the period	0
Borrowings	0
Repayments	0
Other	0
Balance at the end of the period	0
Term loan | Current SPX Term Loan Facilities
Debt
Balance at the beginning of the period	242,700,000
Borrowings	245,000,000.0
Repayments	(243,700,000)
Other	300,000
Balance at the end of the period	244,300,000
Maximum borrowing capacity under financing arrangement		$ 245,000,000.0
Borrowings under line of credit		$ 237,400,000
Unamortized debt issuance costs	$ 700,000		$ 1,000,000.0
Term loan | Current SPX Term Loan Facilities | 2022 and 2023
Debt
Periodic payment (as a percent of principal)	0.625%
Term loan | Current SPX Term Loan Facilities | First three quarters of 2024
Debt
Periodic payment (as a percent of principal)	1.25%