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Property, Plant and Equipment, Significant Sales (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended | 1 Months Ended | 12 Months Ended |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2011 Crystal Holding L.L.C. [Member] | Dec. 31, 2012 Crystal Holding L.L.C. [Member] | Dec. 31, 2011 Crystal Holding L.L.C. [Member] | Dec. 31, 2010 Crystal Holding L.L.C. [Member] | Nov. 30, 2011 Crystal Holding L.L.C. [Member] | Feb. 28, 2011 Marine transportation assets [Member] | Dec. 31, 2012 Marine transportation assets [Member] | Dec. 31, 2011 Marine transportation assets [Member] | Dec. 31, 2010 Marine transportation assets [Member]
Significant Acquisitions and Disposals [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from disposal of assets | $ 1,198.8 | $ 1,053.8 | $ 105.9 | $ 547.8 | $ 0 | $ 547.8 | $ 0 |  | $ 53.2 | $ 0 | $ 53.2 | $ 0
Gains attributable to disposal of assets | 86.4 | 155.7 | 46.7 | 129.1 | 0 | 129.1 | 0 |  | 3.3 |  |  |
Depreciation, amortization and accretion | 1,104.9 | 1,007.0 | 985.1 |  |  | 19.7 | 30.5 |  |  |  |  |
Property, plant and equipment, net (see Note 8) | 24,846.4 | 22,191.6 | 19,332.9 |  |  |  |  | 356.2 |  |  |  |
Total assets | $ 35,934.4 | $ 34,125.1 |  |  |  |  |  | $ 411.9 |  |  |  |

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