Common Stock and Stock-Based Compensation (Tables)

12 Months Ended

May 31, 2013

Common Stock and Stock-based Compensation [Abstract]

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

The following table summarizes the Company’s total stock-based compensation expense recognized in selling and administrative expense:

	Year Ended May 31,
(In millions)	2013		2012		2011
Stock options(1)	$	123	$	96	$	77
ESPPs	19		16		14
Restricted stock	32		18		14
TOTAL STOCK-BASED COMPENSATION EXPENSE	$	174	$	130	$	105

(1) Expense for stock options includes the expense associated with stock appreciation rights. Accelerated stock option expense is recorded for employees eligible for accelerated stock option vesting upon retirement. Accelerated stock option expense for years ended May 31, 2013, 2012, and 2011 was $22 million, $17 million, and $12 million, respectively.

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The weighted average assumptions used to estimate these fair values are as follows:

	Year Ended May 31,
	2013		2012		2011
Dividend yield	1.5	%	1.4	%	1.6	%
Expected volatility	35.0	%	29.5	%	31.5	%
Weighted average expected life (in years)	5.3		5.0		5.0
Risk-free interest rate	0.6	%	1.4	%	1.7	%

Schedule of Share-based Compensation, Stock Options, Activity

The following summarizes the stock option transactions under the plan discussed above:

	Shares (1)		Weighted Average Option Price
	(In millions)
Options outstanding May 31, 2010	72.2		$	23.30
Exercised	(14.0	)	21.35
Forfeited	(1.3	)	29.03
Granted	12.7		34.60
Options outstanding May 31, 2011	69.6		$	25.65
Exercised	(18.0	)	22.81
Forfeited	(1.0	)	35.61
Granted	13.7		45.87
Options outstanding May 31, 2012	64.3		$	30.59
Exercised	(9.9	)	24.70
Forfeited	(1.3	)	40.14
Granted	14.6		46.55
Options outstanding May 31, 2013	67.7		$	34.72
Options exercisable at May 31,
2011	40.1		$	22.03
2012	33.9		24.38
2013	35.9		27.70

(1) Includes stock appreciation rights transactions.