INDEBTEDNESS - Senior Credit Facilities (Details) $ in Millions	3 Months Ended
	Mar. 30, 2024 USD ($)
Line of Credit Facility [Line Items]
Borrowings	$ 622.2
Domestic Line of Credit
Line of Credit Facility [Line Items]
Amount of available borrowing capacity	207.8
Foreign credit instrument facility
Line of Credit Facility [Line Items]
Amount of available borrowing capacity	$ 8.6
Line of Credit
Line of Credit Facility [Line Items]
Weighted-average interest rate of senior credit facilities	7.00%
Revolving Credit Facility | Current Revolving SPX Facilities
Line of Credit Facility [Line Items]
Borrowings	$ 557.2
Revolving Credit Facility | Domestic Revolving Loan Facility
Line of Credit Facility [Line Items]
Borrowings	281.4
Letter of Credit | Domestic Revolving Loan Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity under financing arrangement	10.8
Letter of Credit | Foreign Credit Instrument Facilities
Line of Credit Facility [Line Items]
Maximum borrowing capacity under financing arrangement	$ 16.4