Stock-Based Compensation (Tables)

6 Months Ended

Nov. 30, 2012

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:

	Three Months Ended November 30,				Six Months Ended November 30,
(In millions)	2012		2011		2012		2011
Stock options(1)	$	32	$	26	$	58	$	44
ESPPs		6		5		10		8
Restricted stock		8		5		15		9
TOTAL STOCK-BASED COMPENSATION EXPENSE	$	46	$	36	$	83	$	61

(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 was $6 million and $4 million for the three month periods ended November 30, 2012 and 2011, respectively, and $10 million and $8 million for the six month periods ended November 30, 2012 and 2011, respectively.

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

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

	Six Months Ended November 30,
	2012			2011
Dividend yield		1.5	%		1.4	%
Expected volatility		35.0	%		29.5	%
Weighted average expected life (in years)		5.3			5.0
Risk-free interest rate		0.6	%		1.5	%