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Risk Management and Derivatives - FV of Derivative Instruments Included within Consolidated Balance Sheet (Detail) - USD ($) $ in Millions | May 31, 2018 | May 31, 2017
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | $ 400 | $ 241
Derivative Liabilities | 190 | 254
Designated as Hedging Instrument |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 270 | 126
Derivative Liabilities | 156 | 132
Designated as Hedging Instrument | Foreign Exchange Contract | Prepaid expenses and other current assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 118 | 113
Designated as Hedging Instrument | Foreign Exchange Contract | Deferred income taxes and other assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 152 | 13
Designated as Hedging Instrument | Foreign Exchange Contract | Accrued liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | 156 | 59
Designated as Hedging Instrument | Foreign Exchange Contract | Deferred income taxes and other liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | 0 | 73
Derivatives not designated as hedging instruments |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 130 | 115
Derivative Liabilities | 34 | 122
Derivatives not designated as hedging instruments | Foreign Exchange Contract | Prepaid expenses and other current assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 119 | 103
Derivatives not designated as hedging instruments | Foreign Exchange Contract | Deferred income taxes and other assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 0 | 2
Derivatives not designated as hedging instruments | Foreign Exchange Contract | Accrued liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | 26 | 107
Derivatives not designated as hedging instruments | Foreign Exchange Contract | Deferred income taxes and other liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | 0 | 7
Derivatives not designated as hedging instruments | Embedded derivatives | Prepaid expenses and other current assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 3 | 1
Derivatives not designated as hedging instruments | Embedded derivatives | Deferred income taxes and other assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 8 | 9
Derivatives not designated as hedging instruments | Embedded derivatives | Accrued liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | 2 | 2
Derivatives not designated as hedging instruments | Embedded derivatives | Deferred income taxes and other liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | $ 6 | $ 6

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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226000-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=82924980&loc=SL51823488-111719 + Details
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