Accumulated Other Comprehensive Income - Reclassification out of AOCI (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$ 4,261	$ 3,839
Total selling and administrative expense	2,480	2,058
Other expense (income), net	(3)	(28)
Total before tax	1,229	1,038
Tax benefit (expense)	(267)	(259)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
NET INCOME	(13)	29
Gain (losses) on cash flow hedges | Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(20)	35
Tax benefit (expense)	4	(5)
NET INCOME	(16)	30
Gain (losses) on cash flow hedges | Foreign exchange forwards and options | Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Revenue	(17)	14
Cost of sales	(8)	16
Total selling and administrative expense	0	0
Other expense (income), net	5	5
Other | Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income into Income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other expense (income), net	4	(1)
Total before tax	4	(1)
Tax benefit (expense)	(1)	0
NET INCOME	$ 3	$ (1)