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Commitments, Contingent Liabilities and Other Matters - Large Power Projects in South Africa (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Dec. 31, 2017 | Sep. 30, 2017 | Jul. 01, 2017 | Apr. 01, 2017 | Dec. 31, 2016 | Oct. 01, 2016 | Jul. 02, 2016 | Apr. 02, 2016 | Sep. 26, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Increase in loss from continuing operations before income taxes |  |  |  |  |  |  |  |  |  | $ (36.1) | $ (39.4) | $ 154.3
Reduction in revenues | $ (387.0) | $ (348.5) | $ (349.7) | $ (340.6) | $ (395.3) | $ (345.0) | $ (371.4) | $ (360.6) |  | (1,425.8) | (1,472.3) | (1,559.0)
Increase in costs of products sold |  |  |  |  |  |  |  |  |  | 1,095.6 | 1,096.5 | 1,283.1
Operating income (loss) |  |  |  |  |  |  |  |  |  | 54.8 | 55.0 | (122.2)
South Africa |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reduction in revenues |  |  |  |  |  |  |  |  |  | (56.9) | (105.4) | (54.2)
Large Power Projects | South Africa |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue recognized | 29.0 |  |  |  |  |  |  |  |  | 29.0 |  |
Large Power Projects | Revisions in estimates for large power projects | South Africa |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Increase in loss from continuing operations before income taxes |  |  |  |  |  |  |  |  |  |  |  | 95.0
Reduction in revenues |  |  |  |  |  |  |  |  | $ 57.2 |  |  | 57.2
Increase in costs of products sold |  |  |  |  |  |  |  |  |  |  |  | 37.8
Operating income (loss) |  |  |  |  |  |  |  |  | $ (95.0) |  |  |
Reportable and other operating segments |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  |  | 124.9 | 142.8 | 38.8
Engineered Solutions segment |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reduction in revenues |  |  |  |  |  |  |  |  |  | (654.5) | (736.4) | (797.6)
Engineered Solutions segment | Reportable and other operating segments |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  |  | (12.6) | $ 17.3 | $ (87.4)
Engineered Solutions segment | Reportable and other operating segments | Large Power Projects | Revisions in estimates for large power projects | South Africa |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Reduction in revenues | 23.4 |  | 13.5 |  |  |  |  |  |  | 36.9 |  |
Increase in costs of products sold | 6.5 |  | 9.4 |  |  |  |  |  |  | 15.9 |  |
Operating income (loss) | $ (29.9) |  | $ (22.9) |  |  |  |  |  |  | $ (52.8) |  |

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