Stockholders' Equity (Schedule of Reclassification Adjustments out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 27, 2017	Aug. 28, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Earnings before income taxes	$ 159.5	$ 151.4
Tax benefit (expense)	(38.2)	(40.3)
Earnings from continuing operations	121.3	111.1
Derivatives | Amount Reclassified from AOCI into Net Earnings
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Earnings before income taxes	(0.2)	(1.4)
Tax benefit (expense)	0.0	0.0
Earnings from continuing operations	(0.2)	(1.4)
Derivatives | Equity contracts | Amount Reclassified from AOCI into Net Earnings
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
General and administrative expenses	(0.2)	(1.4)
Accumulated defined benefit plans adjustment, net gain (loss) attributable to parent | Pension and postretirement plan | Amount Reclassified from AOCI into Net Earnings
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Reclassification adjustment from AOCI pension and other postretirement benefit plans, before tax	(0.7)	(0.8)
Accumulated defined benefit plans adjustment, net gain (loss) attributable to parent | Other plans | Amount Reclassified from AOCI into Net Earnings
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Reclassification adjustment from AOCI pension and other postretirement benefit plans, before tax	0.8	0.6
Benefit plan funding position | Amount Reclassified from AOCI into Net Earnings
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Reclassification adjustment from AOCI pension and other postretirement benefit plans, before tax	0.1	(0.2)
Pension and other postretirement benefit plans, tax benefit (expense)	0.0	0.1
Net earnings	$ 0.1	$ (0.1)