Stock Based Compensation (Tables)

12 Months Ended

May 31, 2011

Stock Based Compensation (Tables) Abstract

Stock-based compensation expense

	2011		2010		2009
Stock-based compensation expense	$	98	$	101	$	99

Schedule of Stock Based Compensation Key Assumptions for Valuation

		2011			2010			2009
Weighted-average Black-Scholes value		$	28.12		$	20.47		$	23.66
Intrinsic value of options exercised		$	80		$	77		$	7
Black-Scholes Assumptions:
	Expected lives		5.9 years			5.7 years			5.5 years
	Expected volatility		34	%		32	%		23	%
	Risk-free interest rate		2.36	%		3.24	%		3.28	%
	Dividend yield		0.558	%		0.742	%		0.492	%

Schedule of Stock Option Activity

		Stock Options
		Shares		Weighted-Average Exercise Price	Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value (in millions)(1)
Outstanding at June 1, 2010		20,238,056	$	78.32
	Granted	2,474,603		81.86
	Exercised	(2,043,050)		53.13
	Forfeited	(506,446)		104.38
Outstanding at May 31, 2011		20,163,163	$	81.20	5.7 years	$	327
Exercisable		12,968,690	$	84.74	4.3 years	$	181
Expected to vest		6,618,915	$	74.83	8.2 years	$	135
Available for future grants		11,928,567
(1)	Only presented for options with market value at May 31, 2011 in excess of the exercise price of the option.

Schedule of Vested and Unvested Restricted Stock

		Restricted Stock
		Shares	Weighted-Average Grant Date Fair Value
Unvested at June 1, 2010		637,296	$	74.02
	Granted	235,998		78.74
	Vested	(234,716)		81.11
	Forfeited	(12,198)		70.91
Unvested at May 31, 2011		626,380	$	73.20

Schedule of Stock Option Vesting

	Stock Options
	Vested during the year	Fair value (in millions)
2009	2,414,815	$	64
2010	2,296,211		63
2011	2,721,602		67