Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	May 31, 2020	May 26, 2019	May 27, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ (52.4)	$ 713.4	$ 596.0
Other comprehensive income (loss):
Foreign currency adjustment	5.5	0.6	(0.9)
Change in fair value of marketable securities, net of taxes of $0.0, $0.0 and $0.0, respectively	0.0	0.0	(0.1)
Change in fair value of derivatives and amortization of unrecognized gains and losses on derivatives, net of taxes of $(0.3), $(0.1) and $0.0, respectively	(17.6)	5.6	(4.6)
Net unamortized gain (loss) arising during period, including amortization of unrecognized net actuarial loss, net of taxes of $30.8, $(6.4) and $(0.7), respectively	92.7	(19.2)	(1.1)
Reclassification of tax effect	0.0	0.0	(15.6)
Other comprehensive income (loss)	80.6	(13.0)	(22.3)
Total comprehensive income	$ 28.2	$ 700.4	$ 573.7