Accumulated Other Comprehensive Income - Reclassification out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2016	Aug. 31, 2015
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other (income) expense, net	$ 62	$ 31
Revenues	9,061	8,414
Cost of sales	4,938	4,419
Total before tax	1,281	1,445
Tax (expense) benefit	(32)	(266)
Other comprehensive gains (losses) before reclassifications, net of tax	(44)	(223)
Gains (losses) on foreign currency translation adjustment
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other comprehensive gains (losses) before reclassifications, net of tax	3	(81)
Gain (losses) on cash flow hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other comprehensive gains (losses) before reclassifications, net of tax	(60)	(142)
Other
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other comprehensive gains (losses) before reclassifications, net of tax	13	0
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
NET INCOME	189	190
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]
Total before tax	180	188
Tax (expense) benefit	0	(1)
NET INCOME	180	187
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]
Other (income) expense, net	43	61
Revenues	33	(46)
Cost of sales	104	173
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	8	3
Total before tax	8	3
Tax (expense) benefit	1	0
NET INCOME	$ 9	3
Revisions | Gain (losses) on cash flow hedges
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other comprehensive gains (losses) before reclassifications, net of tax		$ 40