Derivative Instruments and Hedging Activities (Notional and Fair Values Of Derivative Contracts Designated And Not Designated As Hedging Instruments) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		9 Months Ended
		Feb. 26, 2017	May 29, 2016
Derivatives, Fair Value [Line Items]
Derivative contracts, derivative assets, fair value	[1]	$ 0.0	$ 3.8
Derivative contracts, derivative liabilities, fair value	[1]	$ (0.3)	0.0
Designated as Hedging Instruments | Equity forwards
Derivatives, Fair Value [Line Items]
Derivative contracts, number of shares outstanding		0.3
Derivative contracts, weighted-average forward rates		$ 58.80
Derivative contracts, notional		$ 21.1
Derivative contracts, derivative assets, fair value	[1]	0.0	1.2
Derivative contracts, derivative liabilities, fair value	[1]	$ (0.1)	0.0
Not Designated as Hedging Instruments | Equity forwards
Derivatives, Fair Value [Line Items]
Derivative contracts, number of shares outstanding		0.6
Derivative contracts, weighted-average forward rates		$ 51.62
Derivative contracts, notional		$ 29.0
Derivative contracts, derivative assets, fair value	[1]	0.0	2.6
Derivative contracts, derivative liabilities, fair value	[1]	$ (0.2)	$ 0.0

[1] Derivative assets and liabilities are included in receivables, net, prepaid expenses and other current assets and other current liabilities, as applicable, on our consolidated balance sheets.