New Accounting Standards Narrative (Details) - USD ($) $ in Millions	3 Months Ended					12 Months Ended
	May 25, 2018	Feb. 23, 2018	Nov. 24, 2017	Aug. 25, 2017	May 26, 2017	Feb. 23, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales	$ 516.1				$ 490.0
Operating expenses	214.6				210.0
Operating income	23.3				35.1
Other Nonoperating Income (Expense)	3.3				(2.8)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	23.2				$ 28.4
Accounting Standards Update 2017-07 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales	(2.3)	$ 1.1	$ 1.0	$ 1.1		$ 0.9
Operating expenses	(2.9)	0.9	1.0	0.9		(0.1)
Operating income	5.2	(2.0)	(2.0)	(2.0)		(0.8)
Other Nonoperating Income (Expense)	(5.2)	2.0	2.0	2.0		0.8
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ 0.0	$ 0.0	$ 0.0	$ 0.0		$ 0.0