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Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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Value of the not readily marketable security or category which has been determined by management based upon fair value methods, including pricing of similar securities and valuation techniques and is included in the schedule of financial condition or the balance sheet.

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FAIR VALUE (Details) (USD $) In Millions	6 Months Ended												3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended
FAIR VALUE (Details) (USD $) In Millions	Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011 Fair Value Measurements Using Level 1 Noncurrent assets - Investment in equity securities and available-for-sale securities	Dec. 31, 2010 Fair Value Measurements Using Level 1 Noncurrent assets - Investment in equity securities and available-for-sale securities	Jul. 02, 2011 Fair Value Measurements Using Level 2 Current assets - FX embedded derivatives, FX forward contracts and commodity contracts	Dec. 31, 2010 Fair Value Measurements Using Level 2 Current assets - FX embedded derivatives, FX forward contracts and commodity contracts	Jul. 02, 2011 Fair Value Measurements Using Level 2 Current liabilities - FX forward contracts and FX embedded derivatives	Dec. 31, 2010 Fair Value Measurements Using Level 2 Current liabilities - FX forward contracts and FX embedded derivatives	Jul. 02, 2011 Fair Value Measurements Using Level 2 Long-term liabilities - FX embedded derivatives	Dec. 31, 2010 Fair Value Measurements Using Level 2 Long-term liabilities - FX embedded derivatives	Jul. 02, 2011 Fair Value Measurements Using Level 3 Noncurrent assets - Investment in equity securities and available-for-sale securities	Dec. 31, 2010 Fair Value Measurements Using Level 3 Noncurrent assets - Investment in equity securities and available-for-sale securities	Jul. 02, 2011 Test and Measurement	Jul. 02, 2011 Test and Measurement	Jul. 02, 2011 Industrial Products and Services	Jul. 02, 2011 Industrial Products and Services	Jul. 02, 2011 SPX Heat Transfer Inc.
Assets and liabilities measured at fair value on a recurring basis
Certain investments in equity securities that are not readily marketable, fair value											$ 7.8	$ 8.5
Fair value of derivative liability							5.3	6.1	24.0	33.2
Goodwill, Impairment Loss	17.2																17.2
Indefinite-lived Intangible Assets, Impairment Loss																	(7.5)
Fair value of derivative assets			7.6	12.8	5.5	4.1
Reconciliation of investment in equity securities measured at fair value using significant observable inputs
Balance at beginning of year	8.5
Losses included in earnings	(0.7)
Balance at end of year	7.8
Fair value of assets and liabilities
Special charges relating to asset impairments	4.5	2.0											3.7	3.7	0.8	0.8	24.7
Impairment charges of trademark																0.8
Impairment charges of idle facility and certain machinery and equipment		2.0
Fair value of asset acquired	16.2
Fair value of trademark	1.2
Fair value of idle facility assets		2.5
Fair value of machinery and equipment		0.4
Fair value of our debt instruments	1,337.1
Carrying value of our debt instruments	$ 1,246.8