SEGMENT INFORMATION Continued (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	May 31, 2012		May 31, 2011		May 31, 2010
Segment reporting information [Line Items]
Revenues	$ 37,121		$ 35,622		$ 26,820
Long Lived Assets	4,068	[1]	3,833	[1]	3,496	[1]
United States [Member]
Segment reporting information [Line Items]
Revenues	15,767		15,274		11,472
Long Lived Assets	2,468	[1]	2,359	[1]	2,141	[1]
United Kingdom [Member]
Segment reporting information [Line Items]
Revenues	2,302		2,200		1,685
Long Lived Assets	171	[1]	168	[1]	136	[1]
Japan [Member]
Segment reporting information [Line Items]
Revenues	1,865		1,731		1,349
Long Lived Assets	550	[1]	551	[1]	505	[1]
Germany [Member]
Segment reporting information [Line Items]
Revenues	1,484		1,475		1,112
Long Lived Assets	47	[1]	29	[1]	20	[1]
Canada [Member]
Segment reporting information [Line Items]
Revenues	1,234		1,174		888
Long Lived Assets	37	[1]	16	[1]	10	[1]
Australia [Member]
Segment reporting information [Line Items]
Revenues	1,163		1,041		687
Long Lived Assets	38	[1]	34	[1]	28	[1]
France [Member]
Segment reporting information [Line Items]
Revenues	1,162		1,145		965
Long Lived Assets	16	[1]	15	[1]	24	[1]
Other countries [Member]
Segment reporting information [Line Items]
Revenues	12,144		11,582		8,662
Long Lived Assets	$ 741	[1]	$ 661	[1]	$ 632	[1]

[1] Long-lived assets exclude goodwill, intangible assets, equity investments and deferred taxes, which are not allocated to specific geographic locations as it is impracticable to do so.