Accumulated Other Comprehensive Income - Reclassification out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ 9,070	$ 9,061
Cost of sales	(5,108)	(4,938)
Other expense (income), net	(18)	62
Interest expense (income), net	(16)	(7)
Income before income taxes	1,072	1,281
Tax (expense) benefit	(122)	(32)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
NET INCOME	30	189
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	47	180
Tax (expense) benefit	1	0
NET INCOME	48	180
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	2	33
Cost of sales	45	104
Other expense (income), net	2	43
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	(2)	0
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income | Other
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other expense (income), net	(18)	8
Income before income taxes	(18)	8
Tax (expense) benefit	0	1
NET INCOME	$ (18)	$ 9