Fair Value Measurements (Fair Value Measurements Using Significant Unobservable Inputs Reconciliation) (Details) (Derivatives: Commodities, Futures, Swaps & Options, USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 25, 2013
Derivatives: Commodities, Futures, Swaps & Options
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance at May 26, 2013	$ 0
Amount of gain (loss) recognized in earnings (1)	(0.4)	[1]
Purchases, sales and settlements	0
Transfers in and/or out of Level 3	0
Ending balance at August 25, 2013	$ (0.4)

[1] The location of the loss recognized in earnings is restaurant expenses, which is a component of cost of sales.