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Environmental	3 Months Ended
Environmental	Mar. 31, 2013
Environmental Expense and Liabilities [Abstract]
Environmental	Environmental We expensed $0.1 million and $14.3 million for the three months ended March 31, 2013 and 2012, respectively, for environmental remediation obligations. The accrued environmental liability reflected in our consolidated balance sheets was $87.9 million and $88.9 million at March 31, 2013 and December 31, 2012, respectively, of which $68.9 million and $72.6 million, respectively, were classified as other long-term liabilities. These accruals include remediation and monitoring costs expected to be incurred over an extended period of time (up to 30 years for certain projects).

The entire disclosure for environmental loss contingencies, such as presence of hazardous waste, relevant information from reports issued by regulators, and estimated costs to achieve compliance with regulatory requirements. This element may be used for all of an entity's disclosures about environmental loss contingencies.

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