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Acquisitions, Discontinued Operations and Formation of Shanghai Electric JV (Details 2) | 3 Months Ended | 12 Months Ended |  | 12 Months Ended | 0 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended
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Dec. 31, 2013 USD ($) | Sep. 28, 2013 USD ($) | Jun. 29, 2013 USD ($) | Mar. 30, 2013 USD ($) | Dec. 31, 2012 USD ($) | Sep. 29, 2012 USD ($) | Jun. 30, 2012 USD ($) | Mar. 31, 2012 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Dec. 30, 2011 Shanghai Electric JV | Dec. 31, 2013 Dielectric USD ($) | Dec. 31, 2013 Dielectric Maximum USD ($) | Dec. 31, 2013 Kayex USD ($) | Dec. 31, 2012 Tianyu USD ($) | Dec. 31, 2012 Tianyu CNY | Dec. 31, 2013 Weil McLain Shandong USD ($) | Dec. 31, 2012 Weil McLain Shandong USD ($) | Dec. 31, 2013 SPX Service Solutions ("Service Solutions") USD ($) | Dec. 31, 2012 SPX Service Solutions ("Service Solutions") USD ($) | Dec. 31, 2013 Other businesses sold prior to the earliest date presented in the financial statements USD ($) | Dec. 31, 2012 Other businesses sold prior to the earliest date presented in the financial statements USD ($) | Dec. 31, 2011 Other businesses sold prior to the earliest date presented in the financial statements USD ($) | 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 ($) | Dec. 31, 2013 Certain assets of dry cooling products business Shanghai Electric JV CNY
Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of business, net of tax |  |  |  |  |  |  |  |  | $ (4,000,000) | $ 313,400,000 | $ 300,000 |  |  | $ 100,000 | $ 1,300,000 | $ (1,800,000) |  |  | $ 2,200,000 |  | $ 313,400,000 |  |  |  |  |  |  |  |
Cash consideration, exclusive of cash transferred |  |  |  |  |  |  |  |  | 13,500,000 | 1,133,400,000 |  |  | 4,700,000 |  |  |  | 1 |  | 2,700,000 |  |  |  |  |  |  |  |  |  |
Cash consideration, gross |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,900,000 |  |  |  |  |  | 1,134,900,000 |  |  |  |  | 25,800,000 | 51,500,000 |  | 19,400,000
Cash transferred with discontinued business |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,100,000 |  |  | 3,100,000 |  |  |  |  |  |  |  |  |  |
Working capital settlement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,100,000 |  | 800,000 |  |  |  |  |  |  |  |  |
Adjustment to gains (losses) on sale of discontinued operations, net of tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (400,000) |  | 300,000 |  | (4,600,000) | (400,000) | 300,000 |  |  |  |  |
Income from discontinued operations and related income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income from discontinued operations |  |  |  |  |  |  |  |  | 19,100,000 | 631,200,000 | 69,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax provision |  |  |  |  |  |  |  |  | (7,800,000) | (271,400,000) | (25,900,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income from discontinued operations, net of tax | 2,500,000 | 5,400,000 | 8,000,000 | (4,600,000) | 321,000,000 | 12,000,000 | 18,200,000 | 8,600,000 | 11,300,000 | 359,800,000 | 43,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Results of operations for businesses reported as discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 205,000,000 | 1,094,200,000 | 1,189,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax income |  |  |  |  |  |  |  |  | 22,500,000 | 75,600,000 | 72,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable, net | 22,800,000 |  |  |  | 21,200,000 |  |  |  | 22,800,000 | 21,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories, net | 37,600,000 |  |  |  | 32,700,000 |  |  |  | 37,600,000 | 32,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other current assets | 1,200,000 |  |  |  | 1,200,000 |  |  |  | 1,200,000 | 1,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | 16,300,000 |  |  |  | 16,200,000 |  |  |  | 16,300,000 | 16,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill and intangibles, net | 70,400,000 |  |  |  | 71,300,000 |  |  |  | 70,400,000 | 71,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets of discontinued operations | 148,300,000 |  |  |  | 142,600,000 |  |  |  | 148,300,000 | 142,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable | 13,300,000 |  |  |  | 18,300,000 |  |  |  | 13,300,000 | 18,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued expenses | 18,600,000 |  |  |  | 16,600,000 |  |  |  | 18,600,000 | 16,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities of discontinued operations | 31,900,000 |  |  |  | 34,900,000 |  |  |  | 31,900,000 | 34,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest acquired in joint venture (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 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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