Retirement Plans (Fair Values Of Defined Benefit Pension Plans Assets) (Details) - USD ($) $ in Millions	May 26, 2019	May 27, 2018
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	$ 248.5	$ 253.8
Quoted Prices in Active Market for Identical Assets (Liabilities) (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	84.7	0.3
Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	163.8	253.5
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	0.0	0.0
Global Fixed-Income Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	163.8	253.5
Global Fixed-Income Commingled Funds | Quoted Prices in Active Market for Identical Assets (Liabilities) (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	0.0	0.0
Global Fixed-Income Commingled Funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	163.8	253.5
Global Fixed-Income Commingled Funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	0.0	0.0
Cash and Accruals
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	84.7	0.3
Cash and Accruals | Quoted Prices in Active Market for Identical Assets (Liabilities) (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	84.7	0.3
Cash and Accruals | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	0.0	0.0
Cash and Accruals | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	$ 0.0	$ 0.0