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Business Summary And Significant Accounting Policies (Value By Major Class Of Consolidated Depreciable Assets) (Details) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2011
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Dec. 31, 2010
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| Business Summary And Significant Accounting Policies [Abstract] | ||
| Land rights and mineral rights | $ 7,918.9 | $ 3,019.9 |
| Office and information technology | 67.0 | 60.4 |
| Buildings | 132.2 | 107.6 |
| Mining equipment | 1,323.8 | 628.5 |
| Processing equipment | 1,441.8 | 658.8 |
| Railroad equipment | 164.3 | 122.9 |
| Electric power facilities | 57.9 | 54.4 |
| Port facilities | 64.1 | 64.0 |
| Interest capitalized during construction | 22.5 | 19.4 |
| Land improvements | 30.4 | 25.0 |
| Other | 43.2 | 36.0 |
| Construction in progress | 615.4 | 140.0 |
| Property, Plant and Equipment, Gross, Total | 11,881.5 | 4,936.9 |
| Allowance for depreciation and depletion | (1,356.9) | (957.7) |
| Long-lived assets | $ 10,524.6 | $ 3,979.2 |
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- Definition
Information technology assets, Gross No definition available.
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- Definition
Period end amount of property, plant and equipment (PPE) related to interest capitalized during construction. No definition available.
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- Definition
Period end amount of property, plant and equipment (PPE) related to electric power facilities. No definition available.
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- Definition
Period end amount of property, plant and equipment (PPE) related to processing. No definition available.
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- Definition
Period end amount of property, plant and equipment (PPE) related to port facilities. No definition available.
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- Definition
Period end amount of property, plant and equipment (PPE) related to railroad equipment. No definition available.
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- Details
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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
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- Definition
Gross amount, as of the balance sheet date, of long-lived, depreciable assets that include building structures held for productive use including any addition, improvement, or renovation to the structure, such as interior masonry, interior flooring, electrical, and plumbing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Gross amount, at the balance sheet date, of long-lived assets under construction that include construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This element represents alterations to land which improves its potential for use. Generally consisting of items having limited lives, such as walkways, driveways, fences, and parking lots, such improvements are depreciated over the useful lives of the subject assets. No definition available.
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- Definition
Gross amount, as of the balance sheet date, of long-lived, depreciable assets used in the production process to produce goods and services. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Carrying amount at the balance sheet date of mineral rights, or rights to extract a mineral from the earth or to receive payment in the form of a royalty for the extraction of minerals, net of amortization. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- 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
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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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- Definition
This element represents capitalized assets classified as property, plant and equipment not otherwise defined in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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