Stock Based Compensation (Details 2) - May. 31, 2015 $ / shares in Units, $ in Millions		USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award Options Aggregate Intrinsic Value [Abstract]
Outstanding at May 31, 2015 | $	[1]	$ 1,031
Stock options exercisable | $	[1]	678
Stock options expected to vest | $	[1]	$ 331
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Roll Forward
Outstanding at June 1, 2014		15,634,856
Stock options granted		2,445,146
Stock options exercised		(3,516,512)
Stock options forfeited		(341,666)
Outstanding at May 31, 2015		14,221,824
Stock options exercisable		7,994,368
Stock options expected to vest		5,853,809
Stock options available for future grants		13,157,142
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Remaining Contractual Term (in years) [Abstract]
Outstanding at May 31, 2015		6.1
Stock options exercisable		4.5
Stock options expected to vest		8.2
Share Based Compensation Arrangement By Share Based Payment Award Options Weighted Average Exercise Price [Abstract]
Outstanding at June 1, 2014 | $ / shares		$ 91.71
Stock options granted | $ / shares		150.32
Stock options exercised | $ / shares		91.18
Stock options forfeited | $ / shares		107.62
Outstanding at May 31, 2015 | $ / shares		101.54
Stock options exercisable | $ / shares		89.19
Stock options expected to vest | $ / shares		$ 117.39

[1] Only presented for options with market value at May 31, 2015 in excess of the exercise price of the option.