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Environmental and Legal Matters (Details)
 0 Months Ended
Mar. 20, 2014
individuals
Mar. 20, 2014
subsidiaries
Mar. 20, 2014
former_employee
Mar. 20, 2014
companies
Mar. 20, 2014
current_employees
Environmental Remediation Obligations [Abstract]          
Number of defendants 100us-gaap_LossContingencyNumberOfDefendants 2us-gaap_LossContingencyNumberOfDefendants 1us-gaap_LossContingencyNumberOfDefendants 18us-gaap_LossContingencyNumberOfDefendants 2us-gaap_LossContingencyNumberOfDefendants