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DISCONTINUED OPERATIONS (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Statements of Consolidated Operations | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| INCOME (LOSS) and GAIN ON SALE FROM DISCONTINUED OPERATIONS, net of tax | $ 30.8 | $ (2.7) | $ 2.3 | $ 5.5 | $ 16.5 | $ (16.8) | $ 16.3 | $ 4.1 | $ 35.9 | $ 20.1 | $ 22.5 |
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Sonoma [Member]
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Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| ASSETS HELD FOR SALE | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Cash and cash equivalents | 0 | Ìý | Ìý | Ìý | 2.3 | Ìý | Ìý | Ìý | 0 | 2.3 | Ìý |
| Accounts receivable | 0 | Ìý | Ìý | Ìý | 16.3 | Ìý | Ìý | Ìý | 0 | 16.3 | Ìý |
| Inventories | 0 | Ìý | Ìý | Ìý | 18.8 | Ìý | Ìý | Ìý | 0 | 18.8 | Ìý |
| Other current assets | 0 | Ìý | Ìý | Ìý | 2.0 | Ìý | Ìý | Ìý | 0 | 2.0 | Ìý |
| Property, plant and equipment, net | 0 | Ìý | Ìý | Ìý | 120.5 | Ìý | Ìý | Ìý | 0 | 120.5 | Ìý |
| Assets held for sale | 0 | Ìý | Ìý | Ìý | 159.9 | Ìý | Ìý | Ìý | 0 | 159.9 | Ìý |
| LIABILITIES HELD FOR SALE | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Accounts payable | 0 | Ìý | Ìý | Ìý | 15.6 | Ìý | Ìý | Ìý | 0 | 15.6 | Ìý |
| Accrued expenses | 0 | Ìý | Ìý | Ìý | 1.5 | Ìý | Ìý | Ìý | 0 | 1.5 | Ìý |
| Environmental and mine closure obligations | 0 | Ìý | Ìý | Ìý | 8.8 | Ìý | Ìý | Ìý | 0 | 8.8 | Ìý |
| Liabilities held for sale | 0 | Ìý | Ìý | Ìý | 25.9 | Ìý | Ìý | Ìý | 0 | 25.9 | Ìý |
| Statements of Consolidated Operations | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| REVENUES FROM PRODUCT SALES AND SERVICES - Product | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 151.6 | 230.4 | 198.3 |
| INCOME (LOSS) and GAIN ON SALE FROM DISCONTINUED OPERATIONS, net of tax | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 35.9 | 38.6 | 25.6 |
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Income (Loss) From Discontinued Operations [Member] | Sonoma [Member]
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Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| Statements of Consolidated Operations | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý |
| GAIN ON SALE FROM DISCONTINUED OPERATIONS, net of tax | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 38.0 | 0 | 0 |
| Gain on sale from discontinued operations, tax expense | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | 8.1 | Ìý | Ìý |
| INCOME (LOSS) and GAIN ON SALE FROM DISCONTINUED OPERATIONS, net of tax | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | (2.1) | 38.6 | 25.6 |
| Tax effect of discontinued operation, tax expense (benefit) | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | Ìý | $ 2.4 | $ 12.4 | $ 11.0 |
| X | ||||||||||
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- Definition
Disposal group, including discontinued operations, environmental loss contingency and mine reclamation and closing liability current and noncurrent No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The aggregate value (measured at the lower of net carrying value or fair value less cost of disposal) for current assets (assets with expected useful life shorter than one year or one operating cycle, whichever is longer) of a disposal group, including a component of the entity (discontinued operation), to be sold or that has subsequently been disposed of through sale, as of the financial statement date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Tax benefit from provision recognizing a loss for initial, or subsequent, write-down to fair value (less cost to sell) of a of a disposal group that is classified as a component of the entity, which remains unsold as of the reporting date. May include a tax on the (gain) for the recognition of a subsequent increase in fair value (less cost to sell), but not in excess of the cumulative loss previously recognized through write-downs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
For the disposal group, including a component of the entity (discontinued operation), the aggregate of amounts due from customers or clients for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection and net of any write-downs taken for collection uncertainty on the part of the holder, respectively. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
For the disposal group, including a component of the entity (discontinued operation), carrying value of obligations incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
For the disposal group, including a component of the entity (discontinued operation), carrying value of obligations incurred and payable pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include interest, rent, salaries, and utilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
For the disposal group, including a component of the entity (discontinued operation), cash includes currency on hand as well as demand deposits with banks or financial institutions. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
For the disposal group, including a component of the entity (discontinued operation), carrying amount of inventories (net of all valuation allowances and write-downs). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
For the disposal group, including a component of the entity (discontinued operation), carrying amount of assets not otherwise specified in the taxonomy that are expected to be realized or consumed within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
For the disposal group, including a component of the entity (discontinued operation), carrying value (net of accumulated depreciation and any write-downs) of 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. 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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| X | ||||||||||
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- Definition
Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. 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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- Details
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| X | ||||||||||
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- Definition
The obligations arising from the sale, disposal, or planned sale in the near future (generally within one year) of a disposal group, including a component of the entity (discontinued operation). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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