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. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	Apr. 29, 2017	Apr. 30, 2016	May 02, 2015
Earnings Per Share [Abstract]
Net income attributable to Methode Electronics, Inc.	$ 23.1	$ 23.7	$ 24.9	$ 21.2	$ 22.7	$ 17.2	$ 21.2	$ 23.5	$ 92.9	$ 84.6	$ 101.1
Denominator for basic earnings per share-weighted average shares outstanding and vested/unissued restricted stock awards (in shares)									37,283,096	38,333,484	38,686,715
Dilutive potential common shares-employee, restricted stock awards and restricted stock units (in shares)									202,605	138,128	580,151
Denominator for diluted earnings per share (in shares)									37,485,701	38,471,612	39,266,866
Basic income per share (in dollars per share)									$ 2.49	$ 2.21	$ 2.61
Diluted income per share (in dollars per share)									$ 2.48	$ 2.20	$ 2.57