Accumulated Other Comprehensive Income (Loss) - Reclassification out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ 11,243	$ 10,326	$ 21,837	$ 20,986
Cost of sales	(6,396)	(5,782)	(12,249)	(11,571)
Demand creation expense	(729)	(881)	(1,406)	(1,899)
Interest expense (income), net	(70)	(12)	(135)	(27)
Other (income) expense, net	(54)	41	(40)	74
Income before income taxes	1,456	1,249	3,171	2,810
Tax benefit (expense)	(205)	(134)	(402)	(328)
AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Gain (loss), net of tax	41	128	165	256
Gains (losses) on foreign currency translation adjustment | AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other (income) expense, net	1	0	1	0
Income before income taxes	1	0	1
Tax benefit (expense)	0	0	0	0
Gain (loss), net of tax	1	0	1	0
Gain (losses) on cash flow hedges | AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	43	130	178	257
Tax benefit (expense)	(4)	(1)	(7)	(1)
Gain (loss), net of tax	39	129	171	256
Gain (losses) on cash flow hedges | Foreign exchange forwards and options | AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Revenues	26	1	40	9
Cost of sales	31	102	145	177
Demand creation expense	0	(3)	1	(3)
Other (income) expense, net	(13)	31	(5)	77
Gain (losses) on cash flow hedges | Interest rate swaps | AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense (income), net	(1)	(1)	(3)	(3)
OTHER | AMOUNT OF GAIN (LOSS) RECLASSIFIED FROM ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) INTO INCOME
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other (income) expense, net	1	(1)	(7)	0
Income before income taxes	1	(1)	(7)	0
Tax benefit (expense)	0	0	0	0
Gain (loss), net of tax	$ 1	$ (1)	$ (7)	$ 0