Environmental	6 Months Ended
Jun. 30, 2015
Environmental Expense and Liabilities [Abstract]
Environmental	Environmental We expensed $0.1 million and $1.0 million for the three months ended June 30, 2015 and 2014, respectively, and $4.6 million and $1.3 million for the six months ended June 30, 2015 and 2014, respectively, for environmental remediation obligations. The accrued environmental liability reflected in our consolidated balance sheets was $102.8 million and $104.5 million at June 30, 2015 and December 31, 2014, respectively, of which $83.8 million and $81.8 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).

Environmental

6 Months Ended

Jun. 30, 2015

Environmental Expense and Liabilities [Abstract]

We expensed $0.1 million and $1.0 million for the three months ended June 30, 2015 and 2014, respectively, and $4.6 million and $1.3 million for the six months ended June 30, 2015 and 2014, respectively, for environmental remediation obligations. The accrued environmental liability reflected in our consolidated balance sheets was $102.8 million and $104.5 million at June 30, 2015 and December 31, 2014, respectively, of which $83.8 million and $81.8 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).