Stock Based Compensation (Tables)

12 Months Ended

May 31, 2016

Stock Based Compensation (Tables) [Abstract]

Stock-based compensation expense

	2016		2015		2014
Stock-based compensation expense	$	144	$	133	$	117

Schedule of Stock Based Compensation Key Assumptions for Valuation

		2016			2015			2014
Weighted-average Black-Scholes value		$	52.40		$	53.33		$	35.79
Intrinsic value of options exercised		$	115		$	253		$	347
Black-Scholes Assumptions:
	Expected lives		6.4 years			6.3 years			6.2 years
	Expected volatility		28	%		34	%		35	%
	Risk-free interest rate		1.94	%		2.02	%		1.47	%
	Dividend yield		0.519	%		0.448	%		0.561	%

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, 2015		14,221,824	$	101.54
	Granted	2,229,582		171.41
	Exercised	(1,822,547)		100.40
	Forfeited	(187,428)		138.40
Outstanding at May 31, 2016		14,441,431	$	111.99	6.0	$	795
Exercisable		8,717,768	$	92.93	4.6	$	629
Expected to vest		5,408,862	$	141.03	8.1	$	156
Available for future grants		10,948,196
(1)	Only presented for options with market value at May 31, 2016 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, 2015		439,042	$	112.87
	Granted	139,838		168.83
	Vested	(185,933)		104.42
	Forfeited	(3,795)		158.82
Unvested at May 31, 2016		389,152	$	136.57

Schedule of Stock Option Vesting

	Stock Options
	Vested during the year	Fair value (in millions)
2016	2,572,129	$	98
2015	2,611,524		83
2014	2,408,179		65