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DESCRIPTION OF BUSINESS SEGMENTS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Depreciable Lives and Net Book Value of Property and Equipment (Details) - USD ($) $ in Millions | May 31, 2025 | May 31, 2024
--- | --- | ---
Property Plant And Equipment [Line Items] |  |
Net Book Value | $ 41,642 | $ 41,491
Wide-body aircraft and related equipment |  |
Property Plant And Equipment [Line Items] |  |
Net Book Value | $ 18,202 | 17,936
Wide-body aircraft and related equipment | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Depreciable lives range | 18 years |
Wide-body aircraft and related equipment | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Depreciable lives range | 30 years |
Narrow-body and feeder aircraft and related equipment |  |
Property Plant And Equipment [Line Items] |  |
Net Book Value | $ 1,750 | 1,849
Narrow-body and feeder aircraft and related equipment | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Depreciable lives range | 5 years |
Narrow-body and feeder aircraft and related equipment | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Depreciable lives range | 30 years |
Package handling and ground support equipment |  |
Property Plant And Equipment [Line Items] |  |
Net Book Value | $ 7,573 | 7,607
Package handling and ground support equipment | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Depreciable lives range | 3 years |
Package handling and ground support equipment | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Depreciable lives range | 15 years |
Information technology |  |
Property Plant And Equipment [Line Items] |  |
Net Book Value | $ 1,568 | 1,722
Information technology | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Depreciable lives range | 3 years |
Information technology | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Depreciable lives range | 7 years |
Vehicles and trailers |  |
Property Plant And Equipment [Line Items] |  |
Net Book Value | $ 4,075 | 4,053
Vehicles and trailers | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Depreciable lives range | 3 years |
Vehicles and trailers | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Depreciable lives range | 15 years |
Facilities and other |  |
Property Plant And Equipment [Line Items] |  |
Net Book Value | $ 8,474 | $ 8,324
Facilities and other | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Depreciable lives range | 1 year |
Facilities and other | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Depreciable lives range | 33 years |

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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481372/852-10-55-10 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 360 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478451/942-360-50-1 + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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