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Stock-Based Compensation - Schedule of Stock Option Plan Transactions (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	May. 30, 2015	May. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options	$ 2.1
Employee Stock Option
Shares Under Option
Outstanding at end of period (in shares)	1,302,623	1,596,984
Granted at market	75,954
Exercised	264,850
Forfeited or expired	105,465
Ending vested expected to vest	1,298,463
Exercisable at end of period	1,044,419
Weighted-Average Exercise Prices
Outstanding at end of period (in usd per share)	$ 26.05	$ 25.47
Granted at market	30.22
Exercised	21.78
Forfeited or expired	30.99
Ending vested expected to vest	26.04
Exercisable at end of period	$ 26.81
Weighted-Average Remaining Contractual Term
Weighted average remaining contractual term at end of period (in years)	4 years	4 years 8 months 12 days
Ending vested expected to vest	4 years
Exercisable at end of period	3 years
Aggregate Intrinsic Value
Aggregate intrinsic value at end of period (in millions of usd)	$ 4.7	$ 9.9
Ending vested expected to vest	4.7
Exercisable at end of period	$ 3.3

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