DERIVATIVES FINANCIAL INSTRUMENTS (Details) € in Millions, $ in Millions	3 Months Ended
	Aug. 31, 2015 USD ($)	Aug. 31, 2014 USD ($)	May. 31, 2015 USD ($)	Jul. 08, 2014 USD ($)	Jul. 16, 2013 USD ($)	Jul. 10, 2013 EUR (€)
Fair Values of Derivative and Non-Derivative Instruments Designated as Hedges in Condensed Consolidated Balance Sheets [Abstract]
Fair value, assets	$ 75		$ 74
Fair value, liabilities	(222)		(244)
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 (Loss) Recognized in Income on Derivative	1	$ (16)
Amount of (Loss) Gain on Hedged Item Recognized in Income Attributable to Risk Being Hedged	(1)	16
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)	22	(17)
Derivative Instrument Detail [Abstract]
Amount of ineffectiveness measured	0	0
Cash flow hedges [Member] | Cross-currency swap agreements [Member] | 2.25% senior notes due January 2021 [Member]
Debt Instruments [Abstract]
Total debt issued | €						€ 1,250
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%
Stated interest rate percentage	2.25%
Maturity date	Jan. 10, 2021
Cash flow hedges [Member] | Cross-currency swap agreements [Member] | Non-operating income, 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)	$ 51	(52)
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 Condensed Consolidated Balance Sheets [Abstract]
Fair value, liabilities	(222)		(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)	(31)	32
Derivative Instrument Detail [Abstract]
Amount of ineffectiveness measured	$ 0	$ 0
Net investment hedge [Member] | Foreign currency borrowings [Member] | 3.125% senior notes due July 2025 [Member]
Debt Instruments [Abstract]
Total debt issued | €						€ 750
Stated interest rate percentage	3.125%
Maturity date	Jul. 10, 2025
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 Condensed Consolidated Balance Sheets [Abstract]
Fair value, debt	$ (942)		(981)
Fair value hedges [Member] | Interest rate swap agreements [Member] | 2.375% senior notes due January 2019 [Member]
Debt Instruments [Abstract]
Total debt issued					$ 1,500
Stated interest rate percentage	2.375%
Maturity date	Jan. 15, 2019
Fair value hedges [Member] | Interest rate swap agreements [Member] | 2.25% senior notes due October 2019 [Member]
Debt Instruments [Abstract]
Total debt issued				$ 2,000
Stated interest rate percentage	2.25%
Maturity date	Oct. 08, 2019
Fair value hedges [Member] | Interest rate swap agreements [Member] | 2.80% senior notes due July 2021 [Member]
Debt Instruments [Abstract]
Total debt issued				$ 1,500
Stated interest rate percentage	2.80%
Maturity date	Jul. 08, 2021
Fair value hedges [Member] | Interest rate swap agreements [Member] | Other assets [Member]
Fair Values of Derivative and Non-Derivative Instruments Designated as Hedges in Condensed Consolidated Balance Sheets [Abstract]
Fair value, assets	$ 75		$ 74