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v2.4.1.9

Goodwill (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Goodwill [Line Items] |  |
Beginning balance | $ 28.7 us-gaap_Goodwill | $ 28.7 us-gaap_Goodwill
Impairment charge | (7.8)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss |
Effect of exchange rate changes | (4.7)us-gaap_GoodwillTranslationAdjustments | 0 us-gaap_GoodwillTranslationAdjustments
Ending balance | 16.2 us-gaap_Goodwill | 28.7 us-gaap_Goodwill
South America [Member] |  |
Goodwill [Line Items] |  |
Beginning balance | 10.9 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_SouthAmericaMember | 12.2 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_SouthAmericaMember
Impairment charge | (7.8)us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_SouthAmericaMember |
Effect of exchange rate changes | (3.1)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_SouthAmericaMember | (1.3)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_SouthAmericaMember
Ending balance | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_SouthAmericaMember | 10.9 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_SouthAmericaMember
Asia [Member] |  |
Goodwill [Line Items] |  |
Beginning balance | 0.5 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mod_OriginalEquipmentAsiaSegmentMember | 0.5 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mod_OriginalEquipmentAsiaSegmentMember
Impairment charge | 0 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mod_OriginalEquipmentAsiaSegmentMember |
Effect of exchange rate changes | 0 us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = mod_OriginalEquipmentAsiaSegmentMember | 0 us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = mod_OriginalEquipmentAsiaSegmentMember
Ending balance | 0.5 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mod_OriginalEquipmentAsiaSegmentMember | 0.5 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mod_OriginalEquipmentAsiaSegmentMember
Building HVAC [Member] |  |
Goodwill [Line Items] |  |
Beginning balance | 17.3 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mod_BuildingHvacMember | 16.0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mod_BuildingHvacMember
Impairment charge | 0 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mod_BuildingHvacMember |
Effect of exchange rate changes | (1.6)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = mod_BuildingHvacMember | 1.3 us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = mod_BuildingHvacMember
Ending balance | 15.7 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mod_BuildingHvacMember | 17.3 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mod_BuildingHvacMember
Europe [Member] |  |
Goodwill [Line Items] |  |
Impairment charge |  | 8.7 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mod_EuropeSegmentMember
North America [Member] |  |
Goodwill [Line Items] |  |
Impairment charge | $ 23.8 us-gaap_GoodwillImpairedAccumulatedImpairmentLoss / us-gaap_StatementBusinessSegmentsAxis = mod_OriginalEquipmentNorthAmericaSegmentMember |

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a,h) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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X
- Definition Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Details
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mod_OriginalEquipmentAsiaSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Period Type: |

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- Details
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Data Type: | na
Balance Type: |
Period Type: |