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Indebtedness (Details) (USD $) In Millions, unless otherwise specified | 9 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Mar. 31, 2012
Debt Instrument [Line Items] |  |
Short-term debt | $ 26.2 | $ 21.3
Long-term debt, fair value | 143.0 | 139.0
Line of Credit Facility [Line Items] |  |
Available for future borrowings | 191.0 |
Domestic Revolving Credit Facility [Member] |  |
Line of Credit Facility [Line Items] |  |
Amount outstanding | 0 | 9.0
Maximum borrowing capacity | 145.0 |
Expiration date | Aug. 31, 2014 |
Available for future borrowings | 139.0 |
Foreign Credit Facility [Member] |  |
Line of Credit Facility [Line Items] |  |
Available for future borrowings | 52.0 |
Letters of Credit [Member] |  |
Line of Credit Facility [Line Items] |  |
Maximum borrowing capacity | 6.0 |
6.83% Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 125.0 |
Stated interest rate (in hundredths) | 6.83% |
Maturity date | Aug. 12, 2020 |

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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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