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Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2014 | Mar. 31, 2013 | Mar. 31, 2012
Basic [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings (loss) from continuing operations | $ 119.7 | [1],[2] | $ (3.4) | [1],[2] | $ 5.0 | [1],[2] | $ 10.6 | [1],[2] | $ (1.6) | [1] | $ (8.4) | [1] | $ (11.8) | [1] | $ (1.0) | [1] | $ 131.9 | $ (22.8) | $ 38.0
Less: Net earnings attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1.5) | (1.4) | (0.3)
Less: Undistributed earnings attributable to unvested shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1.7) | 0 | (0.2)
Earnings (loss) from continuing operations available to Modine shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 128.7 | (24.2) | 37.5
Earnings from discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0.8
Net earnings (loss) available to Modine shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 128.7 | (24.2) | 38.3
Weighted average shares outstanding - basic (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 46.9 | 46.6 | 46.5
Basic Earnings Per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings (loss) per share - continuing operations (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.75 | $ (0.52) | $ 0.81
Earnings per share - discontinued operations (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 0.02
Net earnings (loss) per share - basic (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.75 | $ (0.52) | $ 0.83
Diluted [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings (loss) from continuing operations | 119.7 | [1],[2] | (3.4) | [1],[2] | 5.0 | [1],[2] | 10.6 | [1],[2] | (1.6) | [1] | (8.4) | [1] | (11.8) | [1] | (1.0) | [1] | 131.9 | (22.8) | 38.0
Less: Net earnings attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1.5) | (1.4) | (0.3)
Less: Undistributed earnings attributable to unvested shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (0.9) | 0 | (0.2)
Earnings (loss) from continuing operations available to Modine shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 129.5 | (24.2) | 37.5
Earnings from discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0.8
Net earnings (loss) available to Modine shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 129.5 | $ (24.2) | $ 38.3
Weighted average shares outstanding - basic (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 46.9 | 46.6 | 46.5
Effect of dilutive securities (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.7 | 0 | 0.4
Weighted average shares outstanding - diluted (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 47.6 | 46.6 | 46.9
Diluted Earnings Per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings (loss) per share - continuing operations (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2.72 | $ (0.52) | $ 0.80
Earnings per share - discontinued operations (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 0.02
Net earnings (loss) per share - diluted (in dollars per share) | $ 2.49 | [2] | $ (0.08) |  | $ 0.10 |  | $ 0.21 |  | $ (0.04) |  | $ (0.19) |  | $ (0.26) |  | $ (0.03) |  | $ 2.72 | $ (0.52) | $ 0.82
Potential dilutive securities (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.3 |
Stock Options [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive securities excluded from computation of earning per share (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.8 | 1.1 | 1.1
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive securities excluded from computation of earning per share (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0.1 | 0.4
[1] | The quarterly financial data presented above includes restructuring expenses and impairment charges, primarily related to our Europe restructuring program and certain restructuring actions in the U.S. During fiscal 2014, restructuring expenses totaled $0.5 million, $0.6 million, $9.4 million, and $5.6 million for the quarters ended June 30, 2013, September 30, 2013, December 31, 2013, and March 31, 2014, respectively. The Company recorded impairment charges of $2.0 million and $1.2 million during the quarters ended December 31, 2013 and March 31, 2014, respectively. During fiscal 2013, restructuring expenses totaled $4.6 million, $1.3 million, $1.4 million, and $9.7 million for the quarters ended June 30, 2012, September 30, 2012, December 31, 2012, and March 31, 2013, respectively. The Company recorded impairment charges of $16.7 million, $8.3 million, and $0.9 million during the quarters ended September 30, 2012, December 31, 2012, and March 31, 2013, respectively. See Note 6 for additional information.
[2] | The quarter ended March 31, 2014 was benefited by the reversal of U.S. income tax valuation allowances totaling $119.2 million. See Note 8 for additional information.

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- Definition The earnings that is allocated to common stock and participating securities to the extent that each security may share in earnings as if all of the earnings for the period had been distributed. Includes the adjustments resulting from the assumption that dilutive securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. + References No definition available. + Details
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- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256 + Details
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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