GOODWILL AND OTHER INTANGIBLE ASSETS (Details 2) - USD ($)		3 Months Ended			9 Months Ended
		Sep. 30, 2017	Oct. 01, 2016	Apr. 02, 2016	Sep. 30, 2017	Oct. 01, 2016	Dec. 31, 2016
Intangible assets with determinable lives
Gross Carrying Value		$ 19,800,000			$ 19,800,000		$ 20,700,000
Accumulated Amortization	[1]	(14,200,000)			(14,200,000)		(13,700,000)
Net Carrying Value		5,600,000			5,600,000		7,000,000
Intangible assets with indefinite lives
Gross carrying value, Total	[1]	131,900,000			131,900,000		131,600,000
Net Carrying Value, Total	[1]	117,700,000			117,700,000		117,900,000
Impairment of intangible assets		0	$ 0		0	$ 4,000,000
HVAC segment
Intangible assets with determinable lives
Net Carrying Value		4,000,000			4,000,000
Intangible assets with indefinite lives
Trademarks		89,400,000			89,400,000
Engineered Solutions segment
Intangible assets with determinable lives
Net Carrying Value		1,600,000			1,600,000
Intangible assets with indefinite lives
Trademarks		12,400,000			12,400,000
Detection and Measurement segment
Intangible assets with indefinite lives
Trademarks		10,300,000			10,300,000
Trademarks with indefinite lives
Intangible assets with indefinite lives
Trademarks		112,100,000			112,100,000		110,900,000
Trademarks with indefinite lives | SPX Heat Transfer Business
Intangible assets with indefinite lives
Impairment of intangible assets				$ 4,000,000	0
Customer relationships
Intangible assets with determinable lives
Gross Carrying Value		1,400,000			1,400,000		1,400,000
Accumulated Amortization		(1,400,000)			(1,400,000)		(1,400,000)
Net Carrying Value		0			0		0
Technology
Intangible assets with determinable lives
Gross Carrying Value		2,100,000			2,100,000		2,100,000
Accumulated Amortization		(500,000)			(500,000)		(400,000)
Net Carrying Value		1,600,000			1,600,000		1,700,000
Patents
Intangible assets with determinable lives
Gross Carrying Value		4,500,000			4,500,000		4,500,000
Accumulated Amortization		(4,500,000)			(4,500,000)		(4,500,000)
Net Carrying Value		0			0		0
Other
Intangible assets with determinable lives
Gross Carrying Value		11,800,000			11,800,000		12,700,000
Accumulated Amortization		(7,800,000)			(7,800,000)		(7,400,000)
Net Carrying Value		$ 4,000,000			$ 4,000,000		$ 5,300,000

[1] Changes in the gross carrying values of “Other Intangibles, Net” during the nine months ended September 30, 2017 related to foreign currency translation.