NOTES PAYABLE AND OTHER BORROWINGS Narrative (Details)	12 Months Ended
May 31, 2016
Notes Payable and Other Borrowings (Narrative) [Abstract]
Debt-related covenants	We were in compliance with all debt-related covenants at May 31, 2016.
Debt instrument redemption description	We may redeem some or all of the senior notes of each series prior to their maturity, subject to certain restrictions, and the payment of an applicable make-whole premium in certain instances except for the floating-rate senior notes which may not be redeemed prior to their maturity.
Revolving Credit Agreement	In May 2016, we entered into three revolving credit agreements with JPMorgan Chase Bank, N.A., as initial lender and administrative agent (the 2016 Credit Agreements) and borrowed $3.8 billion pursuant to these agreements. The 2016 Credit Agreements provided us with short-term borrowings for working capital and other general corporate purposes. Interest for the 2016 Credit Agreements is based on either (1) a LIBOR-based formula or (2) the Base Rate formula, each as set forth in the 2016 Credit Agreements. The borrowings are due and payable on June 27, 2016, which is the termination date of the 2016 Credit Agreements. In April 2013, we entered into a $3.0 billion Revolving Credit Agreement with Wells Fargo Bank, N.A., Bank of America, N.A., BNP Paribas, JPMorgan Chase Bank, N.A. and certain other lenders (the 2013 Credit Agreement). The 2013 Credit Agreement provides for an unsecured 5-year revolving credit facility to be used for general corporate purposes including back-stopping any commercial paper notes that we may issue. Subject to certain conditions stated in the 2013 Credit Agreement, we may borrow, prepay and re-borrow amounts under the 2013 Credit Agreement at any time during the term of the 2013 Credit Agreement. Interest under the 2013 Credit Agreement is based on either (a) a LIBOR-based formula or (b) the Base Rate formula, each as set forth in the 2013 Credit Agreement. Any amounts drawn pursuant to the 2013 Credit Agreement are due on April 20, 2018. No amounts were outstanding pursuant to the 2013 Credit Agreement as of May 31, 2016 and 2015. The 2016 Credit Agreements and the 2013 Credit Agreement contain certain customary representations and warranties, covenants and events of default. If any of the events of default occur and are not cured within applicable grace periods or waived, any unpaid amounts owed under the agreement to which the default relates may be declared immediately due and payable and the relevant agreement may be terminated. We were in compliance with the covenants of the 2016 Credit Agreements and the 2013 Credit Agreement as of May 31, 2016.

NOTES PAYABLE AND OTHER BORROWINGS Narrative (Details)

12 Months Ended

May 31, 2016

Notes Payable and Other Borrowings (Narrative) [Abstract]

We were in compliance with all debt-related covenants at May 31, 2016.

We may redeem some or all of the senior notes of each series prior to their maturity, subject to certain restrictions, and the payment of an applicable make-whole premium in certain instances except for the floating-rate senior notes which may not be redeemed prior to their maturity.

Revolving Credit Agreement

In May 2016, we entered into three revolving credit agreements with JPMorgan Chase Bank, N.A., as initial lender and administrative agent (the 2016 Credit Agreements) and borrowed $3.8 billion pursuant to these agreements. The 2016 Credit Agreements provided us with short-term borrowings for working capital and other general corporate purposes. Interest for the 2016 Credit Agreements is based on either (1) a LIBOR-based formula or (2) the Base Rate formula, each as set forth in the 2016 Credit Agreements. The borrowings are due and payable on June 27, 2016, which is the termination date of the 2016 Credit Agreements. In April 2013, we entered into a $3.0 billion Revolving Credit Agreement with Wells Fargo Bank, N.A., Bank of America, N.A., BNP Paribas, JPMorgan Chase Bank, N.A. and certain other lenders (the 2013 Credit Agreement). The 2013 Credit Agreement provides for an unsecured 5-year revolving credit facility to be used for general corporate purposes including back-stopping any commercial paper notes that we may issue. Subject to certain conditions stated in the 2013 Credit Agreement, we may borrow, prepay and re-borrow amounts under the 2013 Credit Agreement at any time during the term of the 2013 Credit Agreement. Interest under the 2013 Credit Agreement is based on either (a) a LIBOR-based formula or (b) the Base Rate formula, each as set forth in the 2013 Credit Agreement. Any amounts drawn pursuant to the 2013 Credit Agreement are due on April 20, 2018. No amounts were outstanding pursuant to the 2013 Credit Agreement as of May 31, 2016 and 2015. The 2016 Credit Agreements and the 2013 Credit Agreement contain certain customary representations and warranties, covenants and events of default. If any of the events of default occur and are not cured within applicable grace periods or waived, any unpaid amounts owed under the agreement to which the default relates may be declared immediately due and payable and the relevant agreement may be terminated. We were in compliance with the covenants of the 2016 Credit Agreements and the 2013 Credit Agreement as of May 31, 2016.