Commitments and Contingencies Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	13 Months Ended
	Jun. 30, 2014
Loss Contingencies [Line Items]
Environmental Remediation Expense Incurred to Date	$ 110.9
Environmental Remediation Expense	$ 114.0
Minimum [Member]
Loss Contingencies [Line Items]
Estimated Percentage of Environmental Remediation Expense Estimate to be Recovered Through Insurance Proceeds	33.33333%
Maximum [Member]
Loss Contingencies [Line Items]
Estimated Percentage of Environmental Remediation Expense Estimate to be Recovered Through Insurance Proceeds	66.66667%