Debt (Tables)

12 Months Ended

May 31, 2017

Debt Disclosure [Abstract]

Schedule of debt

The following table summarizes debt as of May 31: 

	Carrying Value			Fair Value			Carrying Value			Fair Value
	2017						2016
Loan Agreement:
Revolving Loan (interest rate of n/a and n/a, respectively)	$	—		$	—		$	—		$	—
Unsecured Lines of Credit (weighted average interest rates of 4.1% and 4.4%, respectively)	6.2			6.2			6.3			6.3
Total debt	$	6.2		$	6.2		$	6.3		$	6.3
Less lines of credit and current portion of long-term debt	(6.2		)	(6.2		)	(6.3		)	(6.3		)
Total long-term debt	$	—		$	—		$	—		$	—