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DERIVATIVES FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
May 31, 2016 | May 31, 2015 | May 31, 2014
Fair Values of Derivative and Non-Derivative Instruments Designated as Hedges in Consolidated Balance Sheets [Abstract] |  |  |  |
Fair value, assets | [1] | $ 122 | $ 74 |
Fair value, liabilities |  | (218) | (244) |
2.25% senior notes due January 2021 [Member] |  |  |  |
Debt Instruments [Abstract] |  |  |  |
Senior notes fixed principal amount |  | $ 1,600 |  |
Annual interest rate for the 2.25% notes due January 2021 after the economic effect of the cross-currency swaps |  | 3.53% |  |
Interest rate swap agreements [Member] | Interest expense [Member] |  |  |  |
Effects of Derivative and Non-Derivative Instruments Designated as Hedges on Income and Other Comprehensive Income (OCI) or Loss (OCL) [Abstract] |  |  |  |
Amount of Gain Recognized in Income on Derivative |  | $ 48 | 51 |
Amount of Loss on Hedged Item Recognized in Income Attributable to Risk Being Hedged |  | (48) | (51) |
Cash flow hedges [Member] | Cross-currency swap agreements [Member] |  |  |  |
Effects of Derivative and Non-Derivative Instruments Designated as Hedges on Income and Other Comprehensive Income (OCI) or Loss (OCL) [Abstract] |  |  |  |
Amount of Gain (Loss) Recognized in Accumulated OCI or OCL (Effective Portion) |  | 26 | (318) |
Derivative Instrument Detail [Abstract] |  |  |  |
Amount of ineffectiveness measured |  | 0 | 0 | $ 0
Cash flow hedges [Member] | Cross-currency swap agreements [Member] | 2.25% senior notes due January 2021 [Member] |  |  |  |
Debt Instruments [Abstract] |  |  |  |
Senior notes fixed principal amount |  | $ 1,600 |  |
Annual interest rate for the 2.25% notes due January 2021 after the economic effect of the cross-currency swaps |  | 3.53% |  |
Cash flow hedges [Member] | Cross-currency swap agreements [Member] | Non-operating income (expense), net [Member] |  |  |  |
Effects of Derivative and Non-Derivative Instruments Designated as Hedges on Income and Other Comprehensive Income (OCI) or Loss (OCL) [Abstract] |  |  |  |
Amount of Gain (Loss) Reclassified from Accumulated OCI or OCL into Income (Effective Portion) |  | $ 41 | (348) |
Cash flow hedges [Member] | Cross-currency swap agreements [Member] | Other non-current liabilities [Member] |  |  |  |
Fair Values of Derivative and Non-Derivative Instruments Designated as Hedges in Consolidated Balance Sheets [Abstract] |  |  |  |
Fair value, liabilities |  | (218) | (244) |
Net investment hedge [Member] | Foreign currency borrowings [Member] |  |  |  |
Effects of Derivative and Non-Derivative Instruments Designated as Hedges on Income and Other Comprehensive Income (OCI) or Loss (OCL) [Abstract] |  |  |  |
Amount of Gain (Loss) Recognized in Accumulated OCI or OCL (Effective Portion) |  | (25) | 208 |
Derivative Instrument Detail [Abstract] |  |  |  |
Amount of ineffectiveness measured |  | 0 | 0 | $ 0
Net investment hedge [Member] | Foreign currency borrowings [Member] | Notes payable, non-current [Member] |  |  |  |
Fair Values of Derivative and Non-Derivative Instruments Designated as Hedges in Consolidated Balance Sheets [Abstract] |  |  |  |
Fair value, debt |  | (991) | (981) |
Fair value hedges [Member] | Interest rate swap agreements [Member] | Other assets [Member] |  |  |  |
Fair Values of Derivative and Non-Derivative Instruments Designated as Hedges in Consolidated Balance Sheets [Abstract] |  |  |  |
Fair value, assets |  | $ 122 | $ 74 |
[1] | We have entered into certain interest rate swap agreements that have the economic effects of modifying the fixed-interest obligations associated with the 2.375% senior notes due January 2019 (January 2019 Notes), the 2.25% senior notes due October 2019 (October 2019 Notes) and the 2.80% senior notes due July 2021 (July 2021 Notes) so that the interest payable on these notes effectively became variable based on LIBOR. The effective interest rates after consideration of these fixed to variable interest rate swap agreements were 1.28% and 0.93% for the January 2019 Notes, 1.11% and 0.76% for the October 2019 Notes, and 1.26% and 0.91% for the July 2021 Notes as of May 31, 2016 and 2015, respectively. Refer to Notes 1 and 11 for a description of our accounting for fair value hedges.

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- Definition Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719 + Details
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