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Operations by Business Segment and Geographical Area (Details) (USD $)
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3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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| Operating information by segment | ||||
| Total revenue | $ 6,684,216,000 | $ 7,136,056,000 | $ 21,060,168,000 | $ 20,554,413,000 |
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Oil and Gas Segment
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| Operating information by segment | ||||
| Total revenue | 2,892,700,000 | 2,551,600,000 | 8,518,500,000 | 6,887,400,000 |
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Industrial and Infrastructure Segment
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| Operating information by segment | ||||
| Total revenue | 2,665,000,000 | 3,465,000,000 | 8,879,500,000 | 10,102,000,000 |
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Government Segment
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| Operating information by segment | ||||
| Total revenue | 675,200,000 | 790,100,000 | 2,101,000,000 | 2,511,500,000 |
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Global Services Segment
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| Operating information by segment | ||||
| Total revenue | 149,700,000 | 159,500,000 | 454,000,000 | 503,000,000 |
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Power Segment
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| Operating information by segment | ||||
| Total revenue | 301,600,000 | 169,900,000 | 1,107,200,000 | 550,500,000 |
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Intercompany | Global Services Segment
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| Operating information by segment | ||||
| Total revenue | 128,000,000 | 116,000,000 | 371,100,000 | 341,800,000 |
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Reportable segments
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| Operating information by segment | ||||
| Total segment profit (loss) | 310,600,000 | 278,300,000 | 892,200,000 | 818,300,000 |
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Reportable segments | Oil and Gas Segment
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| Operating information by segment | ||||
| Total segment profit (loss) | 108,300,000 | 87,200,000 | 319,600,000 | 244,700,000 |
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Reportable segments | Industrial and Infrastructure Segment
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| Operating information by segment | ||||
| Total segment profit (loss) | 132,400,000 | 145,000,000 | 388,700,000 | 389,600,000 |
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Reportable segments | Government Segment
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| Operating information by segment | ||||
| Total segment profit (loss) | 37,800,000 | 22,900,000 | 92,700,000 | 98,100,000 |
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Reportable segments | Global Services Segment
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| Operating information by segment | ||||
| Total segment profit (loss) | 24,500,000 | 29,200,000 | 79,800,000 | 100,400,000 |
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Reportable segments | Power Segment
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| Operating information by segment | ||||
| Total segment profit (loss) | 7,600,000 | (6,000,000) | 11,400,000 | (14,500,000) |
| Research and development expense | $ 12,700,000 | $ 15,700,000 | $ 41,100,000 | $ 40,600,000 |