Accumulated Other Comprehensive Income - Reclassification out of AOCI (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 28, 2018	Feb. 28, 2017
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ 8,984	$ 8,432	$ 26,608	$ 25,673
Cost of sales	(5,046)	(4,682)	(15,030)	(14,184)
Other (income) expense, net	1	88	(35)	168
Interest expense (income), net	(13)	(19)	(42)	(41)
Income before income taxes	1,159	1,323	3,110	3,718
Tax (expense) benefit	(2,080)	(182)	(2,314)	(486)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
NET INCOME	(66)	185	(65)	515
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | Foreign Currency Translation Adjustment
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other (income) expense, net	0	1	0	1
Income before income taxes	0	1	0	1
Tax (expense) benefit	0	0	0	0
NET INCOME	0	1	0	1
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | Gain (losses) on cash flow hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	(48)	176	(31)	495
Tax (expense) benefit	(1)	1	2	3
NET INCOME	(49)	177	(29)	498
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | Gain (losses) on cash flow hedges | Foreign exchange forwards and options
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Revenues	9	24	24	96
Cost of sales	(41)	87	(17)	260
Other (income) expense, net	(15)	67	(33)	141
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | Gain (losses) on cash flow hedges | Interest rate swaps
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense (income), net	(1)	(2)	(5)	(2)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | Other
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other (income) expense, net	(16)	9	(35)	17
Income before income taxes	(16)	9	(35)	17
Tax (expense) benefit	(1)	(2)	(1)	(1)
NET INCOME	$ (17)	$ 7	$ (36)	$ 16