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REVENUE (Tables) | 3 Months Ended
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Jul. 28, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |
Revenue, Initial Application Period Cumulative Effect Transition [Table Text Block] |
|  | Impact of Changes in Accounting Policies
(Dollars in Millions) |  | As Reported |  | Adjustments |  | Balance Under ASC 605
Net Sales |  | $ | 223.4 |  |  | $ | (7.1 | ) |  | $ | 230.5 |
Cost of Products Sold |  | $ | 163.3 |  |  | $ | (7.2 | ) |  | $ | 170.5 |
Total Inventories |  | $ | 88.5 |  |  | $ | (0.7 | ) |  | $ | 89.2 |
Contract Assets |  | $ | 1.0 |  |  | $ | 1.0 |  |  | $ | — |
Contract Liabilities |  | $ | 0.2 |  |  | $ | 0.2 |  |  | $ | — |
Retained Earnings |  | $ | 490.0 |  |  | $ | 0.1 |  |  | $ | 489.9 |

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- Definition Revenue, Initial Application Period Cumulative Effect Transition [Table Text Block] + References No definition available. + Details
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Namespace Prefix: | mei_
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration