Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 22, 2015	Feb. 23, 2014	Feb. 22, 2015	Feb. 23, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$ 133.8	$ 109.7	$ 604.2	$ 199.7
Other comprehensive income (loss):
Foreign currency adjustment	(2.0)	(1.7)	3.5	(3.6)
Change in fair value of marketable securities, net of taxes of $0.0, $0.0, $0.0 and $(0.1), respectively	0	0	0	(0.1)
Change in fair value of derivatives and amortization of unrecognized gains and losses on derivatives, net of taxes of $1.0, $1.3, $16.9 and $3.4, respectively	3.0	0	30.4	3.7
Net unamortized gain arising during period, including amortization of unrecognized net actuarial loss, net of taxes of $0.6, $1.0, $10.4, and $3.0, respectively	1.0	1.6	16.4	4.8
Other comprehensive income (loss)	2.0	(0.1)	50.3	4.8
Total comprehensive income	$ 135.8	$ 109.6	$ 654.5	$ 204.5