NOTES PAYABLE AND OTHER BORROWINGS (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2016	Jul. 07, 2016
Notes Payable Other Borrowings [Line Items]
Fixed-rate senior notes	$ 14,000
Unamortized discount/issuance costs	(67)
Total fixed-rate senior notes, net	13,933
Senior notes, par value		$ 14,000
1.90% senior notes due September 2021 [Member]
Notes Payable Other Borrowings [Line Items]
Fixed-rate senior notes	$ 4,250
Date of issuance	Jul. 07, 2016
Effective interest rate	1.94%
Senior notes, par value	$ 4,250
Stated interest rate percentage	1.90%
Maturity date	Sep. 15, 2021
2.40% senior notes due September 2023 [Member]
Notes Payable Other Borrowings [Line Items]
Fixed-rate senior notes	$ 2,500
Date of issuance	Jul. 07, 2016
Effective interest rate	2.40%
Senior notes, par value	$ 2,500
Stated interest rate percentage	2.40%
Maturity date	Sep. 15, 2023
2.65% senior notes due July 2026 [Member]
Notes Payable Other Borrowings [Line Items]
Fixed-rate senior notes	$ 3,000
Date of issuance	Jul. 07, 2016
Effective interest rate	2.69%
Senior notes, par value	$ 3,000
Stated interest rate percentage	2.65%
Maturity date	Jul. 15, 2026
3.85% senior notes due July 2036 [Member]
Notes Payable Other Borrowings [Line Items]
Fixed-rate senior notes	$ 1,250
Date of issuance	Jul. 07, 2016
Effective interest rate	3.85%
Senior notes, par value	$ 1,250
Stated interest rate percentage	3.85%
Maturity date	Jul. 15, 2036
4.00% senior notes due July 2046 [Member]
Notes Payable Other Borrowings [Line Items]
Fixed-rate senior notes	$ 3,000
Date of issuance	Jul. 07, 2016
Effective interest rate	4.00%
Senior notes, par value	$ 3,000
Stated interest rate percentage	4.00%
Maturity date	Jul. 15, 2046