Fair Value Measurements (Fair Values of Financial Instruments Measured at Fair Value on Recurring Basis) (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Nov. 29, 2020	May 31, 2020
Fair Value Assets and Liabilities Measured On Recurring Basis [Line Items]
Total	$ (0.3)	$ 4.4
Commodity contracts:
Fair Value Assets and Liabilities Measured On Recurring Basis [Line Items]
Derivatives	(0.2)	(1.8)
Equity forwards
Fair Value Assets and Liabilities Measured On Recurring Basis [Line Items]
Derivatives	(0.1)	6.2
Quoted prices in active market for identical assets (liabilities) (Level 1)
Fair Value Assets and Liabilities Measured On Recurring Basis [Line Items]
Total	0.0	0.0
Quoted prices in active market for identical assets (liabilities) (Level 1) | Commodity contracts:
Fair Value Assets and Liabilities Measured On Recurring Basis [Line Items]
Derivatives	0.0	0.0
Quoted prices in active market for identical assets (liabilities) (Level 1) | Equity forwards
Fair Value Assets and Liabilities Measured On Recurring Basis [Line Items]
Derivatives	0.0	0.0
Significant other observable inputs (Level 2)
Fair Value Assets and Liabilities Measured On Recurring Basis [Line Items]
Total	(0.3)	4.4
Significant other observable inputs (Level 2) | Commodity contracts:
Fair Value Assets and Liabilities Measured On Recurring Basis [Line Items]
Derivatives	(0.2)	(1.8)
Significant other observable inputs (Level 2) | Equity forwards
Fair Value Assets and Liabilities Measured On Recurring Basis [Line Items]
Derivatives	(0.1)	6.2
Significant unobservable inputs (Level 3)
Fair Value Assets and Liabilities Measured On Recurring Basis [Line Items]
Total	0.0	0.0
Significant unobservable inputs (Level 3) | Commodity contracts:
Fair Value Assets and Liabilities Measured On Recurring Basis [Line Items]
Derivatives	0.0	0.0
Significant unobservable inputs (Level 3) | Equity forwards
Fair Value Assets and Liabilities Measured On Recurring Basis [Line Items]
Derivatives	$ 0.0	$ 0.0