DERIVATIVE FINANCIAL INSTRUMENTS EFFECTS ON BALANCE SHEET (Details) - USD ($) $ in Millions	Aug. 31, 2019	May 31, 2019
Derivative assets:
Total derivative assets	$ 17	$ 5
Derivative liabilities:
Total derivative liabilities	249	230
Fair value hedges [Member] \| Notes payable, current [Member]
Effects of fair value hedging relationship on hedged item in condensed consolidated balance sheet [Abstract]
Carrying amount of hedged item	1,999	1,994
Cumulative hedging adjustments included in the carrying amount	(1)	(5)
Fair value hedges [Member] \| Notes payable and other borrowings, non-current [Member]
Effects of fair value hedging relationship on hedged item in condensed consolidated balance sheet [Abstract]
Carrying amount of hedged item	3,671	3,652
Cumulative hedging adjustments included in the carrying amount	64	44
Fair value hedges [Member] \| Interest Rate Swaps [Member] \| Other non-current assets [Member]
Derivative assets:
Total derivative assets	17	5
Fair value hedges [Member] \| Interest Rate Swaps [Member] \| Other current liabilities [Member]
Derivative liabilities:
Total derivative liabilities	1	5
Fair value hedges [Member] \| Cross-Currency Interest Rate Swaps [Member] \| Other non-current liabilities [Member]
Derivative liabilities:
Total derivative liabilities	8	17
Cash flow hedges [Member] \| Cross-Currency Swaps [Member] \| Other non-current liabilities [Member]
Derivative liabilities:
Total derivative liabilities	$ 240	$ 208

Fair value of all liability derivatives designated as cash flow hedging instruments.

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