INDEBTEDNESS - Summary of Debt Activity (Details) - USD ($)	9 Months Ended	10 Months Ended	39 Months Ended
	Sep. 27, 2025	Sep. 30, 2027	Dec. 31, 2030	Sep. 09, 2025	Dec. 31, 2024
Debt
Balance at the beginning of the period	$ 614,700,000
Borrowings	1,258,600,000
Repayments	(1,372,100,000)
Other	400,000
Balance at the end of the period	501,600,000
Less: short-term debt	1,400,000				$ 10,100,000
Less: current maturities of long-term debt	400,000				27,600,000
Total long-term debt	499,800,000				577,000,000.0
Trade receivables financing arrangement
Debt
Balance at the beginning of the period	9,000,000.0
Borrowings	280,000,000.0
Repayments	(289,000,000.0)
Other	0
Balance at the end of the period	0.0
Maximum borrowing capacity under financing arrangement	100,000,000.0
Debt instrument, unused borrowing capacity, amount	86,100,000
Other indebtedness
Debt
Balance at the beginning of the period	2,300,000
Borrowings	600,000
Repayments	(500,000)
Other	100,000
Balance at the end of the period	2,500,000
Purchase card programs	1,400,000				1,100,000
Finance lease, liability	1,100,000				1,200,000
Revolving loans | Term loan
Debt
Balance at the beginning of the period	80,000,000.0
Borrowings	478,000,000.0
Repayments	(558,000,000.0)
Other	0
Balance at the end of the period	0
Senior Credit Facility | Current SPX Term Loan Facility
Debt
Balance at the beginning of the period	523,400,000
Borrowings	500,000,000.0
Repayments	(524,600,000)
Other	300,000
Balance at the end of the period	499,100,000
Face amount of debt				$ 500,000,000.0
Unamortized debt issuance costs	$ 900,000				$ 1,200,000
Senior Credit Facility | Current SPX Term Loan Facility | Forecast
Debt
Periodic payment (as a percent of principal)		0.625%	1.25%