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CONSOLIDATED STATEMENTS OF SHAREHOLDERS EQUITY - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Treasury Stock	Retained Earnings
Beginning balance at Apr. 29, 2017	$ 541.1	$ 19.1	$ 132.2	$ (25.7)	$ (11.5)	$ 427.0
Beginning balance (in shares) at Apr. 29, 2017		38,133,925
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Earned Portion of Restricted Stock, Net of Tax Withholding	(0.2)					(0.2)
Earned Portion of Restricted Stock, Net of Tax Withholding (in shares)		51,095
Stock-based Compensation Expense	4.0		4.0
Exercise of Stock Options	0.3		0.3
Exercise of Stock Options (in shares)		13,333
Other Comprehensive Income Loss	39.6			39.6
Net Income	57.2					57.2
Dividends on Common Stock	(14.7)					(14.7)
Ending balance at Apr. 28, 2018	630.0	$ 19.1	136.5	13.9	(11.5)	472.0
Ending balance (in shares) at Apr. 28, 2018		38,198,353
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASUs \| Accounting Standards Update 2016-09	2.7					2.7
Earned Portion of Restricted Stock, Net of Tax Withholding	(1.7)	$ 0.1	(0.1)			(1.7)
Earned Portion of Restricted Stock, Net of Tax Withholding (in shares)		135,223
Stock-based Compensation Expense	14.0		14.0
Other Comprehensive Income Loss	(27.5)			(27.5)
Net Income	91.6					91.6
Dividends on Common Stock	(16.8)					(16.8)
Ending balance at Apr. 27, 2019	689.7	$ 19.2	150.4	(13.6)	(11.5)	545.2
Ending balance (in shares) at Apr. 27, 2019		38,333,576
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of ASUs \| Accounting Standards Update 2014-09	0.1					0.1
Earned Portion of Restricted Stock, Net of Tax Withholding	(0.4)					(0.4)
Earned Portion of Restricted Stock, Net of Tax Withholding (in shares)		104,535
Stock-based Compensation Expense	0.3		0.3
Other Comprehensive Income Loss	(13.3)			(13.3)
Net Income	123.4					123.4
Dividends on Common Stock	(16.3)					(16.3)
Ending balance at May. 02, 2020	$ 783.4	$ 19.2	$ 150.7	$ (26.9)	$ (11.5)	$ 651.9
Ending balance (in shares) at May. 02, 2020		38,438,111