Retirement Plans (Fair Values Of Defined Benefit Pension Plans Assets) (Details) - USD ($) $ in Millions	May 27, 2018	May 28, 2017
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	$ 253.8	$ 207.7
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	0.3	6.2
Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	253.5	201.5
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	0.0	0.0
U.S. Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		63.7
U.S. 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
U.S. Commingled Funds | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		63.7
U.S. Commingled Funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		0.0
International Commingled Fund
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		22.8
International Commingled Fund | 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
International Commingled Fund | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		22.8
International Commingled Fund | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		0.0
Emerging Market Commingled Fund
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		6.0
Emerging Market Commingled Fund | 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
Emerging Market Commingled Fund | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		6.0
Emerging Market Commingled Fund | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		0.0
Emerging Market Mutual Fund
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		5.7
Emerging Market Mutual Fund | 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		5.7
Emerging Market Mutual Fund | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		0.0
Emerging Market Mutual Fund | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		0.0
Real Estate Commingled Fund
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		6.0
Real Estate Commingled Fund | 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
Real Estate Commingled Fund | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		6.0
Real Estate Commingled Fund | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		0.0
Global Fixed-Income Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	253.5	20.6
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	253.5	20.6
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
U.S. Fixed-Income Commingled Funds
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets		82.4
U.S. 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
U.S. 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		82.4
U.S. 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
Cash and Accruals
Defined Benefit Plan Disclosure [Line Items]
Fair values of the defined benefit pension plans assets	0.3	0.5
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	0.3	0.5
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