INDEBTEDNESS (Details) - USD ($)		9 Months Ended
		Sep. 30, 2017	Dec. 31, 2016
Debt
Balance at the beginning of the period		$ 356,200,000
Borrowings		142,000,000
Repayments		(131,900,000)
Other	[1]	1,700,000
Balance at the end of the period		368,000,000
Less: short-term debt		39,000,000	$ 14,800,000
Less: current maturities of long-term debt		18,000,000	17,900,000
Total long-term debt		311,000,000	323,500,000
Debt issuance costs		1,300,000	1,600,000
Trade receivables financing arrangement
Debt
Balance at the beginning of the period	[2]	0
Borrowings	[2]	70,000,000
Repayments	[2]	(39,000,000)
Other	[1],[2]	0
Balance at the end of the period	[2]	31,000,000
Maximum borrowing capacity		50,000,000
Amount of available borrowing capacity		18,300,000
Other indebtedness
Debt
Balance at the beginning of the period	[3]	16,600,000
Borrowings	[3]	25,600,000
Repayments	[3]	(33,400,000)
Other	[1],[3]	1,400,000
Balance at the end of the period	[3]	10,200,000
Purchase card programs		3,600,000	3,900,000
Capital lease obligations included in other indebtedness		2,200,000	1,700,000
Revolving loans | Current Revolving SPX Facilities
Debt
Balance at the beginning of the period		0
Borrowings		46,400,000
Repayments		(46,400,000)
Other	[1]	0
Balance at the end of the period		0
Term loans | Current SPX Term Loan Facilities
Debt
Balance at the beginning of the period	[4]	339,600,000
Borrowings	[4]	0
Repayments	[4]	(13,100,000)
Other	[1],[4]	300,000
Balance at the end of the period	[4]	$ 326,800,000
Initial principal amount of the term loan to be repaid annually in quarterly installments (as a percent)		1.25%
Original loan balance		$ 350,000,000.0
Foreign credit instrument facility | Other indebtedness | South Africa and China
Debt
Borrowings under line of credit		$ 4,100,000	$ 10,200,000

[1] “Other” primarily includes debt assumed, foreign currency translation on any debt instruments denominated in currencies other than the U.S. dollar, and the impact of amortization of debt issuance costs associated with the term loan.

[2] Under this arrangement, we can borrow, on a continuous basis, up to $50.0, as available. At September 30, 2017, we had $18.3 of available borrowing capacity under this facility.

[3] Primarily includes balances under a purchase card program of $3.6 and $3.9, capital lease obligations of $2.2 and $1.7, and borrowings under lines of credit in South Africa and China totaling $4.1 and $10.2 at September 30, 2017 and December 31, 2016, respectively. The purchase card program allows for payment beyond the normal payment terms for goods and services acquired under the program. As this arrangement extends the payment of these purchases beyond their normal payment terms through third-party lending institutions, we have classified these amounts as short-term debt.

[4] The term loan is repayable in quarterly installments of 1.25% of the original loan balance of $350.0. The remaining balance is repayable in full on September 24, 2020. Balances are net of unamortized debt issuance costs of $1.3 and $1.6 at September 30, 2017 and December 31, 2016, respectively.