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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2013
Summary of Significant Accounting Policies |
Schedule of costs and estimated earnings on uncompleted contracts |
|  | 2013 |  | 2012 |
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Costs incurred on uncompleted contracts |  | $ | 3,767.4 |  | $ | 3,363.0 |
Estimated earnings to date |  |  | 813.2 |  |  | 804.8 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  | 4,580.6 |  |  | 4,167.8 |
Less: Billings to date |  |  | (4,517.9 | ) |  | (4,066.7 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  | 62.7 |  |  | 101.1 |
Net costs and estimated earnings in excess of billings assumed in the acquisition of Clyde Union (Holdings) S.A.R.L. ("Clyde Union") |  |  | 4.2 |  |  | 10.0 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net costs and estimated earnings in excess of billings |  | $ | 66.9 |  | $ | 111.1 |
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Schedule of net billings in excess of costs and estimated earnings |
|  | 2013 |  | 2012 |
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Costs and estimated earnings in excess of billings(1) |  | $ | 285.3 |  | $ | 359.7 |
Billings in excess of costs and estimated earnings on uncompleted contracts(2) |  |  | (218.4 | ) |  | (248.6 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net costs and estimated earnings in excess of billings |  | $ | 66.9 |  | $ | 111.1 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
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(1) The December 31, 2013 and 2012 balances are reported as a component of "Accounts receivable, net." (2) The December 31, 2013 and 2012 balances are reported as a component of "Accrued expenses."

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- Definition Tabular disclosure of net billings in excess of costs and estimated earnings on uncompleted contracts. + References No definition available. + Details
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- Definition Tabular disclosure of costs and estimated earnings on uncompleted contracts, from their inception, and related amounts billed. + References No definition available. + Details
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