NOTES PAYABLE AND OTHER BORROWINGS (Details) (USD $) In Millions, unless otherwise specified	May 31, 2012		May 31, 2011
Notes Payable Other Borrowings [Line Items]
Total borrowings	$ 16,474		$ 15,922
Notes payable, current and other current borrowings	2,950		1,150
Notes payable, non-current and other non-current borrowings	13,524		14,772
Short term borrowings [Member]
Notes Payable Other Borrowings [Line Items]
Short-term borrowings	1,700		1,150
4.95% senior notes due April 2013 [Member]
Notes Payable Other Borrowings [Line Items]
Senior notes	1,250		1,250
3.75% senior notes due July 2014 [Member]
Notes Payable Other Borrowings [Line Items]
Senior notes	1,569	[1]	1,569	[1]
Fair value adjustment	69	[1]	69	[1]
5.25% senior notes due January 2016 [Member]
Notes Payable Other Borrowings [Line Items]
Senior notes	1,996		1,995
Unamortized discount on debt issued	4		5
5.75% senior notes due April 2018 [Member]
Notes Payable Other Borrowings [Line Items]
Senior notes	2,499		2,499
Unamortized discount on debt issued	1		1
5.00% senior notes due July 2019 [Member]
Notes Payable Other Borrowings [Line Items]
Senior notes	1,745		1,745
Unamortized discount on debt issued	5		5
3.875% senior notes due July 2020 [Member]
Notes Payable Other Borrowings [Line Items]
Senior notes	998		998
Unamortized discount on debt issued	2		2
6.50% senior notes due April 2038 [Member]
Notes Payable Other Borrowings [Line Items]
Senior notes	1,248		1,248
Unamortized discount on debt issued	2		2
6.125% senior notes due July 2039 [Member]
Notes Payable Other Borrowings [Line Items]
Senior notes	1,242		1,242
Unamortized discount on debt issued	8		8
5.375% senior notes due July 2040 [Member]
Notes Payable Other Borrowings [Line Items]
Senior notes	2,226		2,225
Unamortized discount on debt issued	24		25
Capital leases [Member]
Notes Payable Other Borrowings [Line Items]
Capital leases	$ 1		$ 1

[1] Refer to Note 11 for a description of our accounting for fair value hedges.