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Acquisitions And Other Investments (Narrative) (Details)
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1 Months Ended | 3 Months Ended | 3 Months Ended | ||||
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Jan. 31, 2012
T
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Mar. 31, 2012
USD ($)
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Mar. 31, 2012
Consolidated Thompson [Member]
T
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Jun. 30, 2011
Consolidated Thompson [Member]
T
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May 12, 2011
Consolidated Thompson [Member]
USD ($)
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May 12, 2011
Consolidated Thompson [Member]
CAD
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Mar. 31, 2012
WISCO [Member]
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| Business Acquisition [Line Items] | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Cost per share acquired | Ìý | Ìý | Ìý | Ìý | Ìý | 17.25 | Ìý |
| Consideration transferred, amount | Ìý | Ìý | Ìý | Ìý | $ 4,600,000,000 | Ìý | Ìý |
| Subsidiary or equity method investee percentage ownership acquired | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 25.00% |
| Initial production rate, metric tons | 16,000,000 | Ìý | 8,000,000 | 16,000,000 | Ìý | Ìý | Ìý |
| Mineral rights | Ìý | 4,825,600,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Long-term deferred tax liabilities | Ìý | 1,041,800,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Noncontrolling interest in subsidiary | Ìý | 1,075,400,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Increase in Other Current Liabilities | Ìý | 6,100,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Increase in Other Noncurrent Liabilities | Ìý | 10,300,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Pre-acquisition date Quebec mining duties tax | Ìý | 16,400,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Reduction of calculated minimum distribution payable to the minority partner | Ìý | (2,600,000) | Ìý | Ìý | Ìý | Ìý | Ìý |
| Increase in goodwill | Ìý | 13,800,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Preliminary goodwill | Ìý | $ 997,300,000 | Ìý | Ìý | Ìý | Ìý | Ìý |
| Goodwill tax deductibility | Ìý | None of the preliminary goodwill is expected to be deductible for income tax purposes. | Ìý | Ìý | Ìý | Ìý | Ìý |
| X | ||||||||||
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- Definition
Business Acquisition, Cost Of Acquired Entity, Cash Paid Per Share No definition available.
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| X | ||||||||||
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- Definition
Initial production rate, metric tons No definition available.
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| X | ||||||||||
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- Definition
Pre-acquisition date Quebec mining duties tax No definition available.
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| X | ||||||||||
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- Definition
Reduction of calculated minimum distribution payable to the minority partner No definition available.
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| X | ||||||||||
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- Definition
Subsidiary or Equity Method Investee Percentage Ownership Acquired No definition available.
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| X | ||||||||||
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- Definition
Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of deferred tax assets or liabilities for the differences between the values assigned and the tax bases of assets and liabilities in a business combination, net of any valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This element represents a narrative description of the amount of goodwill recognized in connection with a business combination which is expected to be deductible for income tax purposes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The change during the reporting period in the carrying value of goodwill. The change could be the result of new goodwill acquired, goodwill impairment during the period, goodwill written off related to the sale of a business or other adjustments to goodwill. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The increase (decrease) during the reporting period in other current operating liabilities not separately disclosed in the statement of cash flows. No definition available.
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| X | ||||||||||
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- Definition
The increase (decrease) during the reporting period in other noncurrent operating liabilities not separately disclosed in the statement of cash flows. No definition available.
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| X | ||||||||||
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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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