Share-Based Awards and Options (Tables)

12 Months Ended

May 31, 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 and the related total income tax benefit recognized for (i) stock options, (ii) restricted stock (including PRSUs and TSRs, each as defined below), and (iii) shares issued under our employee stock purchase plan.

	2014			2013			2012
	(in millions)
Share-based compensation expense	$	29.8		$	18.4		$	16.4
Income tax benefit	$	(7.1	)	$	(5.6	)	$	(6.0	)

Schedule of Changes in Non-Vested Restricted Stock Awards Activity

The following table summarizes the changes in non-vested restricted stock awards for the years ended May 31, 2014 and 2013 (shares in thousands):

	Shares		Weighted Average Grant-Date Fair Value
Non-vested at May 31, 2012	941		$	44
Granted	561		44
Vested	(315	)	43
Forfeited	(91	)	44
Non-vested at May 31, 2013	1,096		44
Granted	544		47
Vested	(643	)	45
Forfeited	(120	)	45
Non-vested at May 31, 2014	877		$	45

Schedule of Share-based Compensation, Stock Options, Activity

The following is a summary of our stock option activity as of and for the years ended May 31, 2014 and 2013:

	Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
	(in thousands)				(years)	(in millions)
Outstanding at May 31, 2012	2,145		$	34	4.1	$	20.7
Granted	—		—
Forfeited	(72	)	39
Exercised	(308	)	23
Outstanding at May 31, 2013	1,765		35		3.5	23.9
Granted	—		—
Forfeited	(65	)	39
Exercised	(934	)	30
Outstanding at May 31, 2014	766		$	41	3.8	$	21.3
Options vested and exercisable at May 31, 2014	725		$	41	3.6	$	20.1
Options vested and exercisable at May 31, 2013	1,586		$	34	3.1	$	22.3