Capital Stock and Stock-Based Awards (Tables)

12 Months Ended

May 31, 2014

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

Schedule of capital stock

Capital stock consisted of the following as of May 31, 2014:

	Class A Stock	Common Stock	Preferred Stock
Authorized	4,000,000	70,000,000	2,000,000
Reserved for Issuance	1,499,000	7,245,021	—
Outstanding	1,656,200	30,605,978	—

Schedule of share-based compensation activity

The following table sets forth the intrinsic value of stock options exercised, pretax stock-based compensation cost and related tax benefits for the Class A Stock and Common Stock plans for the fiscal years ended May 31:

	2014		2013		2012
Total intrinsic value of stock options exercised	$	4.6	$	2.3	$	5.0
Stock-based compensation cost (pretax)	$	9.3	$	6.3	$	12.2
Tax benefits related to stock-based compensation cost	$	1.7	$	0.8	$	1.8
Weighted average grant date fair value per option	$	10.37	$	9.77	$	9.30

Schedule of stock option activity

The following table sets forth the stock option activity for the Class A Stock and Common Stock plans for the fiscal year ended May 31, 2014:

	Options		Weighted Average Exercise Price		Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding at May 31, 2013	4,185,480		$	29.49
Granted	778,434		$	30.12
Exercised	(506,380	)	$	23.94
Expired	(41,000	)	$	31.43
Cancellations and forfeitures	(61,167	)	$	28.82
Outstanding at May 31, 2014	4,355,367		$	30.23	4.8	$	12.3
Exercisable at May 31, 2014	3,156,844		$	30.70	3.3	$	8.8

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of nonvested restricted stock unit activity

The following table sets forth the RSU and MSPP Stock Unit activity for the year ended May 31, 2014:

	Stock Units/RSUs		Weighted Average grant date fair value
Nonvested as of May 31, 2013	559,403		$	29.98
Granted	68,497		$	30.07
Vested	(295,572	)	$	16.84
Forfeited	(9,834	)	$	28.90
Nonvested as of May 31, 2014	322,494		$	21.33

Schedule of employee stock purchase plan activity

The following table sets forth the ESPP share activity for the fiscal years ended May 31:

	2014		2013
Shares issued	57,835		68,228
Weighted average purchase price per share	$	26.92	$	24.78

Restricted Stock Units (RSUs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of restricted stock unit activity

The following table sets forth the RSU award activity for the fiscal years ended May 31:

	2014		2013		2012
RSUs granted	67,670		125,584		205,620
Weighted average grant date price per unit	$	30.34	$	23.05	$	27.92

Management Stock Purchase Plan [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of restricted stock unit activity

The following table sets forth the MSPP Stock Unit activity for the fiscal years ended May 31:

	2014		2013
MSPP Stock Units allocated	827		87,317
Purchase price per unit	$	21.15	$	19.73