Consolidated Statement of Stockholders Equity (USD $) In Millions, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Deferred Compensation, Share-based Payments [Member]
Stockholders' Equity Attributable to Parent Period Start at May. 31, 2008	$ 23.4	$ 11.1	$ 0	$ 76.7	$ (60.1)	$ (4.3)
Common Stock, Shares, Outstanding Period Start at May. 31, 2008		55,706,997
Net Earnings Attributable to Parent	68.0		0	68.0	0	0
Other Comprehensive Income, Foreign Currency Transaction and Translation Adjustment, Net of Tax	(14.0)		0	0	(14.0)	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(59.9)		0	0	(59.9)	0
Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	(0.1)		0	0	(0.1)	0
Comprehensive Income, Net of Tax, Attributable to Parent	(6.0)
Dividends, Cash	(15.5)		0	(15.5)	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		23,050
Stock Issued During Period, Value, Stock Options Exercised	0.5	0	0.5	0	0	0
Stock Issued During Period, Shares, Employee Stock Purchase Plans		187,037
Stock Issued During Period, Value, Employee Stock Purchase Plan	2.7	0	2.7	0	0	0
Stock Repurchased and Retired During Period, Shares		(2,138,701)
Stock Repurchased and Retired During Period, Value	(0.1)	(0.3)	0.2	0	0	0
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Units, Requisite Service Period Recognition	0.2	0	0.2	0	0	0
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		14,074
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0.4	0	0.4	0	0	0
Stock Granted During Period, Shares, Share-based Compensation		3,600
Stock Granted During Period, Value, Share-based Compensation	0.7	0	0.7	0	0	0
Adjustments to Additional Paid in Capital, Tax Effect from Share-based Compensation	0.1	0	0.1	0	0	0
Stock Issued During Period, Value, Share-based Compensation	0	0	(0.5)	0	0	0.5
Excess Tax Benefit from Stock-based Compensation, Financing Activities	(0.3)	0	(0.3)	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period		30,004
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost	0.4	0	0.4	0	0	0
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationPerformanceshares	(1.4)	0	(1.4)	0	0	0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	2.9	0	2.9	0	0	0
Stockholders' Equity Attributable to Parent Period End at May. 30, 2009	8.0	10.8	5.9	129.2	(134.1)	(3.8)
Common Stock, Shares, Outstanding Period End at May. 30, 2009		53,826,061
Stock Issued During Period, Value, Employee Benefit Plan	16.7	0.2	16.5	0	0	0
Stock Issued During Period, Shares, Acquisitions		2,041,666
Net Earnings Attributable to Parent	28.3	0	0	28.3	0	0
Other Comprehensive Income, Foreign Currency Transaction and Translation Adjustment, Net of Tax	(2.9)	0	0	0	(2.9)	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	0.6	0	0	0	0.6	0
Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	0.2	0	0	0	0.2	0
Comprehensive Income, Net of Tax, Attributable to Parent	26.2
Dividends, Cash	(5.1)	0	0	(5.1)	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		10,000
Stock Issued During Period, Value, Stock Options Exercised	0.2	0	0.2	0	0	0
Stock Issued During Period, Shares, Employee Stock Purchase Plans		133,048
Stock Issued During Period, Value, Employee Stock Purchase Plan	2.2	0	2.2	0	0	0
Stock Repurchased and Retired During Period, Shares		(44,654)
Stock Repurchased and Retired During Period, Value	(0.8)	0	(0.8)	0	0	0
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Units, Requisite Service Period Recognition	1.0	0	1.0	0	0	0
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		8,896
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0.2	0	0.2	0	0	0
Stock Granted During Period, Shares, Share-based Compensation		41,981
Stock Granted During Period, Value, Share-based Compensation	0.4	0	0.4	0	0	0
Adjustments to Additional Paid in Capital, Tax Effect from Share-based Compensation	0.1	0	0.1	0	0	0
Stock Issued During Period, Value, Share-based Compensation	0	0	(0.4)	0	0	0.4
Excess Tax Benefit from Stock-based Compensation, Financing Activities	(0.5)	0	(0.5)	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period		18,735
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost	0.3	0	0.3	0	0	0
Stock Issued During Period, Value, Acquisitions	28.7	0.4	28.3	0	0	0
Stock Issued During Period, Shares, Employee Benefit Plan		967,000
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	2.5	0	2.5	0	0	0
Stockholders' Equity Attributable to Parent Period End at May. 29, 2010	80.1	11.4	55.9	152.4	(136.2)	(3.4)
Common Stock, Shares, Outstanding Period End at May. 29, 2010	57,002,733	57,002,733
Stock Issued During Period, Value, Employee Benefit Plan	14.6	0.1	14.5	0	0	0
Net Earnings Attributable to Parent	70.8			70.8
Other Comprehensive Income, Foreign Currency Transaction and Translation Adjustment, Net of Tax	6.4				6.4
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	25.5				25.5
Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	0.1				0.1
Comprehensive Income, Net of Tax, Attributable to Parent	102.8
Dividends, Cash	(5.0)			(5.0)	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		309,252
Stock Issued During Period, Value, Stock Options Exercised	6.6	0.1	6.5	0	0	0
Stock Issued During Period, Shares, Employee Stock Purchase Plans		99,593
Stock Issued During Period, Value, Employee Stock Purchase Plan	2.1	0	2.1	0	0	0
Stock Repurchased and Retired During Period, Shares		(49,694)
Stock Repurchased and Retired During Period, Value	(1.0)	0	(1.0)	0	0	0
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures		64,958
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	1.5	0	1.5	0	0	0
Stock Granted During Period, Shares, Share-based Compensation		30,907
Stock Issued During Period, Value, Share-based Compensation	0		(0.8)			0.8
Excess Tax Benefit from Stock-based Compensation, Financing Activities	0.1	0	0.1	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period		9,109
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost	0.2	0	0.2	0	0	0
Stock Issued During Period, Shares, Employee Benefit Plan		582,000
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	2.5		2.5
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value	0.5	0	0.5	0	0	0
Stockholders' Equity Attributable to Parent Period End at May. 28, 2011	$ 205.0	$ 11.6	$ 82.0	$ 218.2	$ (104.2)	$ (2.6)
Common Stock, Shares, Outstanding Period End at May. 28, 2011	58,048,858	58,048,858