Treasury Stock (Tables)

9 Months Ended

Feb. 28, 2017

Stockholders' Equity Attributable to Parent [Abstract]

Tabular Disclosure of an Entity's Treasury Stock

The table below represents the current Board authorization:

	Amount
July 2015	50.0
Less repurchases made under the authorization as of February 28, 2017	(10.5		)
Remaining Board authorization at February 28, 2017	$	39.5