Summary of Significant Accounting Policies (Tables)

9 Months Ended

Feb. 26, 2012

Summary of Significant Accounting Policies [Abstract]

Summary of income tax expense (benefit) on components of other comprehensive income (loss)

	Thirteen weeks ended				Thirty-nine weeks ended
	February 26, 2012		February 27, 2011		February 26, 2012			February 27, 2011
Net derivative adjustment	$	6.7	$	0.8	$	(40.6	)	$	0.8
Unrealized gains (losses) on available-for-sale securities		0.1		—		—			0.1
Pension and postretirement healthcare liabilities		3.3		1.4		21.4			4.3
	$	10.1	$	2.2	$	(19.2	)	$	5.2