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Contingencies and Litigation (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended |
--- | --- | ---
Sep. 30, 2013 Site | Mar. 31, 2013
Environmental Matters [Abstract] |  |
Reserves for these environmental matters | $ 5.1 | $ 5.2
Number of sites remediation considered for potentially responsible party | 3 |

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- Definition Number of sites for which United States Environmental Protection Agency ("USEPA") has designated the entity as a potentially responsible party ("PRP") for remediation. + References No definition available. + Details
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- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
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