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Equity Compensation Plans (Tables)

6 Months Ended

Nov. 30, 2017

Stock Option Activity

A summary of stock option activity during the six months ended November 30, 2017 follows:

		Shares				Weighted- Average Exercise Price
		(in thousands)
Options outstanding June 1, 2017			2,708			$	32.88
Granted			819				59.26
Exercised			(603	)			27.50
Forfeited			(59	)			39.87
Options outstanding November 30, 2017			2,865				41.41

Fair Value of Stock Options Granted, Estimated using Weighted-Average Assumptions

The fair value of stock options granted was estimated using the following weighted-average assumptions.

		FY 2018				FY 2017
Risk-free interest rate			1.6	%			1.2	%
Expected dividend yield			0.0	%			0.0	%
Expected stock price volatility			27.7	%			35.2	%
Expected option life			4.0 years				4.0 years

X

- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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