Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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DERIVATIVE FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Millions	12 Months Ended
	May 31, 2018	May 31, 2017	May 31, 2016
Fair Values of Derivative and Non-Derivative Instruments Designated as Hedges in Consolidated Balance Sheets [Abstract]
Fair value, liabilities	$ (158)	$ (191)
Fair value, assets	29	40
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	(66)	(82)	$ 48
Amount of Gain (Loss) on Hedged Item Recognized in Income Attributable to Risk Being Hedged	66	82	(48)
Fair value hedges [Member] \| Interest rate swap agreements [Member] \| Other current liabilities [Member]
Fair Values of Derivative and Non-Derivative Instruments Designated as Hedges in Consolidated Balance Sheets [Abstract]
Fair value, liabilities	(7)	0
Fair value hedges [Member] \| Interest rate swap agreements [Member] \| Other non-current assets [Member]
Fair Values of Derivative and Non-Derivative Instruments Designated as Hedges in Consolidated Balance Sheets [Abstract]
Fair value, assets	29	40
Fair value hedges [Member] \| Interest rate 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	(48)	0
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)	88	27	26
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)	51	2	41
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	(103)	(191)
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)	(30)	(1)	$ (25)
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	$ 0	$ (980)