Risk Management and Derivatives - Amounts Affecting Consolidated Statements of Income (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2019	Feb. 28, 2018
Derivatives not designated as hedging instruments | Foreign exchange forwards and options | Other (income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	$ (59)	$ (101)	$ 129	$ (270)
Derivatives not designated as hedging instruments | Embedded derivatives | Other (income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivatives	(2)	1	2	(3)
Derivatives designated as cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivatives	(42)	(158)	356	(524)
Amount of Gain (Loss) Reclassified From Accumulated Other Comprehensive Income into Income	51	(48)	13	(31)
Derivatives designated as cash flow hedges | Foreign exchange forwards and options | Revenues
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivatives	(50)	7	(31)	26
Amount of Gain (Loss) Reclassified From Accumulated Other Comprehensive Income into Income	1	9	9	24
Derivatives designated as cash flow hedges | Foreign exchange forwards and options | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivatives	(1)	(118)	273	(382)
Amount of Gain (Loss) Reclassified From Accumulated Other Comprehensive Income into Income	34	(41)	0	(17)
Derivatives designated as cash flow hedges | Foreign exchange forwards and options | Demand creation expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivatives	2	0	2	1
Amount of Gain (Loss) Reclassified From Accumulated Other Comprehensive Income into Income	0	0	0	0
Derivatives designated as cash flow hedges | Foreign exchange forwards and options | Other (income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivatives	7	(47)	112	(169)
Amount of Gain (Loss) Reclassified From Accumulated Other Comprehensive Income into Income	18	(15)	9	(33)
Derivatives designated as cash flow hedges | Interest rate swaps | Interest expense (income), net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivatives	0	0	0	0
Amount of Gain (Loss) Reclassified From Accumulated Other Comprehensive Income into Income	$ (2)	$ (1)	$ (5)	$ (5)