Fair Value Measurements (Narrative) (Details) - USD ($)	3 Months Ended
	Aug. 26, 2018	May 27, 2018
Impaired Long-Lived Assets Held and Used [Line Items]
Carrying value of long-term debt	$ 926,800,000	$ 926,500,000
Fair value of long-term debt	939,600,000	922,000,000
Long-lived assets	2,473,600,000	2,429,800,000
Impairment of long-lived assets	$ 3,700,000
Significant unobservable inputs (Level 3) | Carrying Value
Impaired Long-Lived Assets Held and Used [Line Items]
Long-lived assets		3,700,000
Significant unobservable inputs (Level 3) | Fair Value
Impaired Long-Lived Assets Held and Used [Line Items]
Long-lived assets		$ 0