Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 23, 2020	Feb. 28, 2021	Feb. 23, 2020
Statement of Comprehensive Income [Abstract]
Net earnings	$ 128.7	$ 232.3	$ 260.8	$ 427.6
Other comprehensive income:
Foreign currency adjustment	0.2	0.0	0.4	5.5
Change in fair value of derivatives and amortization of unrecognized gains and losses on derivatives, net of taxes of $0.2, $0.0, $0.5 and $(0.1), respectively	7.1	0.7	16.6	(4.9)
Net unamortized gain (loss) arising during the period, including amortization of unrecognized net actuarial gain (loss), net of taxes of $0.1, $(0.1), $0.4 and $32.3, respectively, related to pension and other post-employment benefits	0.5	(0.6)	1.3	97.2
Other comprehensive income	7.8	0.1	18.3	97.8
Total comprehensive income	$ 136.5	$ 232.4	$ 279.1	$ 525.4