BUSINESS SEGMENTS AND DISAGGREGATED REVENUE - Schedule of Segment Information (Details) - USD ($) $ in Millions |
1 Months Ended | 3 Months Ended | 4 Months Ended | |||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Segment Reporting [Line Items] | ||||||
| Revenue | $ 7,787 | $ 6,462 | $ 22,855 | $ 20,432 | $ 30,642 | $ 26,894 |
| Operating expenses: | 7,243 | 6,305 | 21,788 | 19,460 | 29,031 | 25,765 |
| OPERATING INCOME | 544 | 157 | 1,067 | 972 | 1,611 | 1,129 |
| Gain (loss) on short-term investment | 4,492 | 0 | (1,238) | 0 | 3,254 | 0 |
| Interest, net | (23) | (41) | (66) | (125) | (89) | (166) |
| Other non-operating, net | 199 | 15 | 661 | 67 | 860 | 82 |
| Total Other (Expense) Income | 4,668 | (26) | (643) | (58) | 4,025 | (84) |
| INCOME BEFORE INCOME TAXES | $ 5,212 | $ 131 | 424 | 914 | 5,636 | 1,045 |
| Operating Segments | Express U.S. Domestic and Express International Segment | ||||||
| Segment Reporting [Line Items] | ||||||
| OPERATING INCOME | 1,166 | 1,076 | 1,799 | 1,307 | ||
| Operating Segments | Express U.S. Domestic Segment | ||||||
| Segment Reporting [Line Items] | ||||||
| Revenue | 14,710 | 13,392 | 19,748 | 17,596 | ||
| Operating expenses: | 13,764 | 12,508 | 18,348 | 16,508 | ||
| OPERATING INCOME | 946 | 884 | 1,400 | 1,088 | ||
| Operating Segments | Express International Segment | ||||||
| Segment Reporting [Line Items] | ||||||
| Revenue | 7,465 | 6,363 | 9,994 | 8,398 | ||
| Operating expenses: | 7,245 | 6,171 | 9,595 | 8,179 | ||
| OPERATING INCOME | 220 | 192 | 399 | 219 | ||
| Corporate, other, and eliminations | ||||||
| Segment Reporting [Line Items] | ||||||
| OPERATING INCOME | $ (99) | $ (104) | $ (188) | $ (178) | ||
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- Definition Total costs of sales and operating expenses for the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of interest income (expense) classified as nonoperating. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of unrealized gain (loss) on investment. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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