Share-Based Awards and Options (Tables)

9 Months Ended

Feb. 28, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

The following table summarizes the share-based compensation cost charged to income for (i) all stock options granted, (ii) our restricted stock program (including PRSUs and TSRs, each as defined below), and (iii) our employee stock purchase plan. The total income tax benefit recognized for share-based compensation in the accompanying statements of income is also presented.

	Three Months Ended				Nine Months Ended
	February 28, 2014		February 28, 2013		February 28, 2014		February 28, 2013
	(in millions)
Share-based compensation expense	$	5.3	$	5.0	$	17.3	$	14.1
Income tax benefit	$	2.0	$	1.5	$	5.2	$	4.1

Schedule of Changes in Non-Vested Restricted Stock Awards Activity

The following table summarizes the changes in non-vested restricted stock awards for the nine months ended February 28, 2014 (shares in thousands):

	Shares		Weighted Average Grant-Date Fair Value
Non-vested at May 31, 2013	1,096		$	44
Granted	550		47
Vested	(360	)	44
Forfeited	(104	)	44
Non-vested at February 28, 2014	1,182		45

Schedule of Share-based Compensation, Stock Options, Activity

The following is a summary of our stock option activity as of and for the nine months ended February 28, 2014:

					Weighted
			Weighted		Average
			Average		Remaining	Aggregate
			Exercise		Contractual	Intrinsic
	Options		Price		Term	Value
	(in thousands)				(years)	(in millions)
Outstanding at May 31, 2013	1,765		$	35	3.5	$	23.9
Granted	—		—
Forfeited	(64	)	39
Exercised	(911	)	30
Outstanding at February 28, 2014	790		$	40	4.1	$	23.2
Options vested and exercisable at February 28, 2014	732		$	41	3.9	$	21.3