Risk Management and Derivatives - Amounts Affecting Consolidated Statements of Income (Detail) - USD ($) $ in Millions	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
Foreign Exchange Contract | Other (income) expense, net | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
AMOUNT OF GAIN (LOSS) RECOGNIZED IN INCOME ON DERIVATIVES	$ 76	$ 166	$ (57)
Embedded derivatives | Other (income) expense, net | Derivatives not designated as hedging instruments
Derivative Instruments, Gain (Loss) [Line Items]
AMOUNT OF GAIN (LOSS) RECOGNIZED IN INCOME ON DERIVATIVES	(1)	7	(4)
Derivatives designated as cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
AMOUNT OF GAIN (LOSS) RECOGNIZED IN OTHER COMPREHENSIVE INCOME (LOSS) ON DERIVATIVES	402	577	(49)
AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME	519	76	(131)
Derivatives designated as cash flow hedges | Foreign Exchange Contract | Revenue
Derivative Instruments, Gain (Loss) [Line Items]
AMOUNT OF GAIN (LOSS) RECOGNIZED IN OTHER COMPREHENSIVE INCOME (LOSS) ON DERIVATIVES	28	14	19
AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME	(17)	(5)	34
Derivatives designated as cash flow hedges | Foreign Exchange Contract | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
AMOUNT OF GAIN (LOSS) RECOGNIZED IN OTHER COMPREHENSIVE INCOME (LOSS) ON DERIVATIVES	283	405	(50)
AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME	364	53	(90)
Derivatives designated as cash flow hedges | Foreign Exchange Contract | Demand creation expense
Derivative Instruments, Gain (Loss) [Line Items]
AMOUNT OF GAIN (LOSS) RECOGNIZED IN OTHER COMPREHENSIVE INCOME (LOSS) ON DERIVATIVES	1	2	1
AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME	(2)	0	1
Derivatives designated as cash flow hedges | Foreign Exchange Contract | Other (income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
AMOUNT OF GAIN (LOSS) RECOGNIZED IN OTHER COMPREHENSIVE INCOME (LOSS) ON DERIVATIVES	90	156	(19)
AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME	181	35	(69)
Derivatives designated as cash flow hedges | Interest rate swaps | Interest (income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
AMOUNT OF GAIN (LOSS) RECOGNIZED IN OTHER COMPREHENSIVE INCOME (LOSS) ON DERIVATIVES	0	0	0
AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME	$ (7)	$ (7)	$ (7)