Risk Management and Derivatives - FV of Derivative Instruments Included within Consolidated Balance Sheet (Detail) - USD ($) $ in Millions	May 31, 2020	May 31, 2019
Derivatives, Fair Value [Line Items]
DERIVATIVE ASSETS	$ 95	$ 622
Derivatives formally designated as hedging instruments
Derivatives, Fair Value [Line Items]
DERIVATIVE ASSETS	44	509
DERIVATIVE LIABILITIES	190	5
Derivatives formally designated as hedging instruments | Foreign Exchange Contract | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
DERIVATIVE ASSETS	43	509
Derivatives formally designated as hedging instruments | Foreign Exchange Contract | Deferred income taxes and other assets
Derivatives, Fair Value [Line Items]
DERIVATIVE ASSETS	1	0
Derivatives formally designated as hedging instruments | Foreign Exchange Contract | Accrued liabilities
Derivatives, Fair Value [Line Items]
DERIVATIVE LIABILITIES	173	5
Derivatives formally designated as hedging instruments | Foreign Exchange Contract | Deferred income taxes and other liabilities
Derivatives, Fair Value [Line Items]
DERIVATIVE LIABILITIES	17	0
Derivatives not designated as hedging instruments
Derivatives, Fair Value [Line Items]
DERIVATIVE ASSETS	51	113
DERIVATIVE LIABILITIES	207	54
Derivatives not designated as hedging instruments | Deferred income taxes and other liabilities
Derivatives, Fair Value [Line Items]
DERIVATIVE LIABILITIES	17	49
Derivatives not designated as hedging instruments | Foreign Exchange Contract | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
DERIVATIVE ASSETS	48	102
Derivatives not designated as hedging instruments | Foreign Exchange Contract | Deferred income taxes and other assets
Derivatives, Fair Value [Line Items]
DERIVATIVE ASSETS	2	0
Derivatives not designated as hedging instruments | Foreign Exchange Contract | Accrued liabilities
Derivatives, Fair Value [Line Items]
DERIVATIVE LIABILITIES	15	46
Derivatives not designated as hedging instruments | Embedded derivatives | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
DERIVATIVE ASSETS	1	5
Derivatives not designated as hedging instruments | Embedded derivatives | Deferred income taxes and other assets
Derivatives, Fair Value [Line Items]
DERIVATIVE ASSETS	0	6
Derivatives not designated as hedging instruments | Embedded derivatives | Accrued liabilities
Derivatives, Fair Value [Line Items]
DERIVATIVE LIABILITIES	2	1
Derivatives not designated as hedging instruments | Embedded derivatives | Deferred income taxes and other liabilities
Derivatives, Fair Value [Line Items]
DERIVATIVE LIABILITIES	$ 0	$ 2