Stock-Based Compensation Plans (Tables)

12 Months Ended

May 31, 2012

Weighted-Average Grant Date Fair Value of Options Granted and Weighted-Average Assumptions Used for Grants

The following table sets forth the information about the weighted-average grant date fair value of options granted during the three years ended May 31, 2012 and the weighted-average assumptions used for such grants.

	2012			2011			2010
Weighted average grant date fair value	$	13.80		$	18.52		$	16.83
Weighted average assumptions used:
Expected volatility		.450			.462			.469
Expected option term in years		6.7			6.7			6.5
Risk-free interest rate		1.31	%		2.68	%		3.20	%
Expected dividend yield		.02	%		.74	%		.83	%

Option Transactions

A summary of option transactions for the three years ended May 31, 2012, follows:

	Shares Under Option			Weighted-Average Option Price
Outstanding at May 31, 2009		1,594,757		$	38.03
Granted		320,450			36.15
Exercised		(122,884	)		25.50
Canceled		(27,807	)		39.20
Outstanding at May 31, 2010		1,764,516			38.54
Granted		358,450			40.22
Exercised		(103,280	)		22.51
Canceled		(47,245	)		43.13
Outstanding at May 31, 2011		1,972,441			39.58
Granted		389,850			29.75
Exercised		(105,269	)		21.44
Canceled		(111,452	)		42.31
Outstanding at May 31, 2012		2,145,570		$	38.54

Stock Options Outstanding

The following table summarizes information about stock options outstanding as of May 31, 2012.

	Range of Exercise Prices
	$16.04—$29.38		$33.57—$48.60		$50.63—$70.18
Options outstanding
Shares outstanding		818,763		800,257		526,550
Weighted-average remaining life in years		6.72		6.67		4.06
Weighted-average exercise price	$	25.32	$	39.68	$	57.37
Options exercisable
Shares exercisable		323,633		346,447		490,340
Weighted-average remaining life in years		3.71		5.12		3.99
Weighted-average exercise price	$	21.09	$	41.06	$	57.86