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v2.4.1.9

GOODWILL AND INTANGIBLE ASSETS - Goodwill Rollforward (Details) (USD $) In Millions, unless otherwise specified | 9 Months Ended
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Jan. 31, 2015
Goodwill [Roll Forward] |
Beginning balance | $ 13.0 us-gaap_Goodwill
Foreign currency translation | (0.2)us-gaap_GoodwillTranslationAdjustments
Ending balance | 12.8 us-gaap_Goodwill
Interconnect |
Goodwill [Roll Forward] |
Beginning balance | 12.0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mei_InterconnectMember
Foreign currency translation | (0.2)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = mei_InterconnectMember
Ending balance | 11.8 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mei_InterconnectMember
Power Products |
Goodwill [Roll Forward] |
Beginning balance | 1.0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mei_PowerProductsMember
Foreign currency translation | 0 us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = mei_PowerProductsMember
Ending balance | $ 1.0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mei_PowerProductsMember

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
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_GoodwillRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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
Name: | us-gaap_GoodwillTranslationAdjustments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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