Stock Based Compensation (Tables)

12 Months Ended

May 31, 2013

Stock Based Compensation (Tables) [Abstract]

Stock-based compensation expense

	2013		2012		2011
Stock-based compensation expense	$	109	$	105	$	98

Schedule of Stock Based Compensation Key Assumptions for Valuation

		2013			2012			2011
Weighted-average Black-Scholes value		$	29.20		$	29.92		$	28.12
Intrinsic value of options exercised		$	107		$	67		$	80
Black-Scholes Assumptions:
	Expected lives		6.1 years			6.0 years			5.9 years
	Expected volatility		35	%		34	%		34	%
	Risk-free interest rate		0.94	%		1.79	%		2.36	%
	Dividend yield		0.609	%		0.563	%		0.558	%

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, 2012		21,031,538	$	84.39
	Granted	2,547,290		88.08
	Exercised	(3,979,359)		70.41
	Forfeited	(464,035)		91.44
Outstanding at May 31, 2013		19,135,434	$	87.62	5.5 years	$	229
Exercisable		12,447,517	$	90.23	4.2 years	$	137
Expected to vest		6,288,642	$	82.77	8.1 years	$	87
Available for future grants		6,482,410
(1)	Only presented for options with market value at May 31, 2013 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, 2012		589,872	$	76.79
	Granted	220,391		85.45
	Vested	(253,423)		75.46
	Forfeited	(27,506)		80.13
Unvested at May 31, 2013		529,334	$	80.86

Schedule of Stock Option Vesting

	Stock Options
	Vested during the year	Fair value (in millions)
2013	2,824,757	$	81
2012	2,807,809		70
2011	2,721,602		67