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FAIR VALUE (Details) (USD $) In Millions, unless otherwise specified |  |  | 3 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9 Months Ended |  |
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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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- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 16 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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