XML 67 R17.htm IDEA: XBRL DOCUMENT

Environmental	6 Months Ended
Environmental	Jun. 30, 2012
Environmental Expense and Liabilities [Abstract]
Environmental	Environmental We expensed $1.0 million and $0.1 million for the three months ended June 30, 2012 and 2011, respectively, and $15.2 million and $0.1 million for the six months ended June 30, 2012 and 2011, respectively, for environmental remediation obligations. The accrued environmental liability reflected in our consolidated balance sheets was $61.4 million and $42.2 million at June 30, 2012 and December 31, 2011, respectively, of which $48.7 million and $31.7 million, respectively, were classified as other long-term liabilities. These accruals include remediation costs expected to be incurred over an extended period of time. It also includes $15.6 million in environmental liabilities that were assumed upon our merger with Frontier.

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.

+ References+ Details