|
Property, Plant And Equipment (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | ||
|---|---|---|---|
|
Mar. 31, 2012
|
Mar. 31, 2011
|
Dec. 31, 2011
|
|
| Property, Plant and Equipment, Gross | $ 12,244.7 | Ìý | $ 11,881.5 |
| Allowance for depreciation and depletion | (1,478.0) | Ìý | (1,356.9) |
| Total depreciable assets | 10,766.7 | Ìý | 10,524.6 |
| Cost of goods sold depreciation and depletion expense | 111.4 | 71.7 | Ìý |
|
Land Rights And Mineral Rights [Member]
|
Ìý | Ìý | Ìý |
| Property, Plant and Equipment, Gross | 7,969.0 | Ìý | 7,918.9 |
|
Office And Information Technology [Member]
|
Ìý | Ìý | Ìý |
| Property, Plant and Equipment, Gross | 68.4 | Ìý | 67.0 |
|
Buildings [Member]
|
Ìý | Ìý | Ìý |
| Property, Plant and Equipment, Gross | 138.1 | Ìý | 132.2 |
|
Mining Equipment [Member]
|
Ìý | Ìý | Ìý |
| Property, Plant and Equipment, Gross | 1,394.7 | Ìý | 1,323.8 |
|
Processing Equipment [Member]
|
Ìý | Ìý | Ìý |
| Property, Plant and Equipment, Gross | 1,505.3 | Ìý | 1,441.8 |
|
Railroad Equipment [Member]
|
Ìý | Ìý | Ìý |
| Property, Plant and Equipment, Gross | 203.7 | Ìý | 164.3 |
|
Electric Power Facilities [Member]
|
Ìý | Ìý | Ìý |
| Property, Plant and Equipment, Gross | 58.0 | Ìý | 57.9 |
|
Port Facilities [Member]
|
Ìý | Ìý | Ìý |
| Property, Plant and Equipment, Gross | 96.4 | Ìý | 64.1 |
|
Interest Capitalized During Construction [Member]
|
Ìý | Ìý | Ìý |
| Property, Plant and Equipment, Gross | 24.8 | Ìý | 22.5 |
|
Land Improvements [Member]
|
Ìý | Ìý | Ìý |
| Property, Plant and Equipment, Gross | 30.6 | Ìý | 30.4 |
|
Other Property Plant And Equipment [Member]
|
Ìý | Ìý | Ìý |
| Property, Plant and Equipment, Gross | 73.3 | Ìý | 43.2 |
|
Construction in Progress [Member]
|
Ìý | Ìý | Ìý |
| Property, Plant and Equipment, Gross | $ 682.4 | Ìý | $ 615.4 |
| X | ||||||||||
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- Definition
Cost of goods sold depreciation depletion No definition available.
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| X | ||||||||||
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- Definition
The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Gross amount, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
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- Definition
Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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