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ACQUISITIONS, DISCONTINUED OPERATIONS AND FORMATION OF SHANGHAI ELECTRIC JV (Details 2) | 3 Months Ended |  |  | 3 Months Ended | 0 Months Ended | 1 Months Ended | 3 Months Ended
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Mar. 30, 2013 USD ($) | Mar. 31, 2012 USD ($) | Mar. 30, 2013 Shanghai Electric JV | Dec. 30, 2011 Shanghai Electric JV | Mar. 30, 2013 Kayex USD ($) | Dec. 31, 2012 Tianyu USD ($) | Dec. 31, 2012 Tianyu CNY | Mar. 30, 2013 Weil McLain Shandong USD ($) | Dec. 31, 2012 Weil McLain Shandong USD ($) | Mar. 30, 2013 SPX Service Solutions ("Service Solutions") USD ($) | Dec. 31, 2012 SPX Service Solutions ("Service Solutions") USD ($) | Mar. 30, 2013 Other businesses sold prior to the earliest date presented in the financial statements USD ($) | Mar. 31, 2012 Other businesses sold prior to the earliest date presented in the financial statements USD ($) | Dec. 30, 2011 Certain assets of dry cooling products business Shanghai Electric JV CNY | Dec. 31, 2012 Certain assets of dry cooling products business Shanghai Electric JV CNY | Jan. 31, 2012 Certain assets of dry cooling products business Shanghai Electric JV CNY | Mar. 31, 2012 Certain assets of dry cooling products business Shanghai Electric JV USD ($)
Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on disposition of discontinued operations, net of tax | $ (5,200,000) | $ (300,000) |  |  | $ (2,100,000) | $ (1,800,000) |  |  | $ 2,200,000 |  | $ 313,400,000 |  |  |  |  |  |
Cash consideration, exclusive of cash transferred |  |  |  |  |  |  | 1 |  | 2,700,000 |  |  |  |  |  |  |  |
Cash consideration, gross |  |  |  |  |  |  |  |  |  |  | 1,134,900,000 |  |  |  | 25,800,000 | 51,500,000 |
Cash transferred with discontinued business |  |  |  |  |  | 1,100,000 |  |  | 3,100,000 |  |  |  |  |  |  |  |
Adjustment to gain (loss) on sale of discontinued operations, net of tax |  |  |  |  |  |  |  | (400,000) |  | (1,300,000) |  | (1,400,000) | (300,000) |  |  |  |
Income (loss) from discontinued operations and related income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from discontinued operations | (6,000,000) | 7,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax provision | (1,400,000) | (2,500,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from discontinued operations, net of tax | (7,400,000) | 4,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Results of operations for businesses reported as discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | 4,200,000 | 237,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax income (loss) | (3,500,000) | 7,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest acquired in joint venture (as a percent) |  |  | 45.00% | 45.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Dispositions, consideration to be received |  |  |  |  |  |  |  |  |  |  |  |  |  | 96,700,000 |  |  |
Net gain associated with deconsolidation |  | $ 20,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 20,500,000

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