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Income Per Share Attributable to Methode Shareholders - Schedule of the Computation of Basic and Diluted Income Per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Apr. 28, 2018
Jan. 27, 2018
Oct. 28, 2017
Jul. 29, 2017
Apr. 29, 2017
Jan. 28, 2017
Oct. 29, 2016
Jul. 30, 2016
Apr. 28, 2018
Apr. 29, 2017
Apr. 30, 2016
Earnings Per Share [Abstract]                      
Net Income $ 36.8 $ (24.3) $ 24.2 $ 20.5 $ 23.1 $ 23.7 $ 24.9 $ 21.2 $ 57.2 $ 92.9 $ 84.6
Denominator for basic earnings per share-weighted average shares outstanding and vested/unissued restricted stock awards (in shares)                 37,281,630 37,283,096 38,333,484
Weighted Average Number Diluted Shares Outstanding Adjustment                 260,269 202,605  
Dilutive potential common shares-employee, restricted stock awards and restricted stock units (in shares)                     138,128
Denominator for diluted earnings per share (in shares)                 37,541,899 37,485,701 38,471,612
Basic income per share (in dollars per share)                 $ 1.54 $ 2.49 $ 2.21
Diluted income per share (in dollars per share)                 $ 1.52 $ 2.48 $ 2.20