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FAIR VALUE (Details) (USD $) In Millions, unless otherwise specified			3 Months Ended															9 Months Ended
	Sep. 29, 2012	Dec. 31, 2011	Jul. 02, 2011 SPX Heat Transfer Inc.	Sep. 29, 2012 Senior Notes	Dec. 31, 2011 Senior Notes	Sep. 29, 2012 Term Loans	Dec. 31, 2011 Term Loans	Sep. 29, 2012 Other indebtedness	Dec. 31, 2011 Other indebtedness	Sep. 29, 2012 Quoted Prices in Active Markets for Identical Assets (Level 1) Noncurrent assets	Dec. 31, 2011 Quoted Prices in Active Markets for Identical Assets (Level 1) Current assets - Investment in equity securities and available-for-sale securities	Sep. 29, 2012 Significant Observable Inputs (Level 2) Current assets	Dec. 31, 2011 Significant Observable Inputs (Level 2) Current assets	Sep. 29, 2012 Significant Observable Inputs (Level 2) Current liabilities	Dec. 31, 2011 Significant Observable Inputs (Level 2) Current liabilities	Sep. 29, 2012 Significant Observable Inputs (Level 2) Long-term liabilities	Dec. 31, 2011 Significant Observable Inputs (Level 2) Long-term liabilities	Sep. 29, 2012 Significant Unobservable Inputs (Level 3)	Oct. 01, 2011 Significant Unobservable Inputs (Level 3)	Sep. 29, 2012 Significant Unobservable Inputs (Level 3) Noncurrent assets	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) Current assets - Investment in equity securities and available-for-sale securities
Assets and liabilities measured at fair value on a recurring basis
Fair value of derivative assets										$ 3.7	$ 5.2	$ 2.6	$ 1.2							$ 7.6	$ 7.8
Fair value of derivative liability														4.8	1.9	12.9	14.8
Reconciliation of investment in equity securities measured at fair value using significant unobservable inputs
Balance at beginning of period																		7.8	8.5
Losses included in earnings																		(0.2)	(1.3)
Balance at end of period																		7.6	7.2
Fair value of assets and liabilities
Goodwill, Impairment Loss			17.2
Indefinite-lived intangible assets impairment loss			7.5
Fair value of debt instruments				1,224.5	1,198.0	800.0	800.0	226.4	75.1
Carrying value of debt instruments				1,100.0	1,100.0	800.0	800.0
Carrying value of debt instruments	$ 2,149.2	$ 2,001.1						$ 226.4	$ 75.1

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