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RETIREMENT PLANS (Tables) | 6 Months Ended
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Nov. 30, 2025
Retirement Benefits [Abstract] |
Schedule of Retirement Plan Costs | Our retirement plans costs for the periods ended November 30, 2025 and 2024 were as follows (in millions):
| Three Months Ended |  | Six Months Ended
| November 30, 2025 |  | November 30, 2024 |  | November 30, 2025 |  | November 30, 2024
Defined benefit pension plans | $ | 46 |  |  | $ | 70 |  |  | $ | 93 |  |  | $ | 140 |
Defined contribution plans | 312 |  |  | 288 |  |  | 618 |  |  | 575 |
Postretirement healthcare plans | 23 |  |  | 21 |  |  | 45 |  |  | 43 |
| $ | 381 |  |  | $ | 379 |  |  | $ | 756 |  |  | $ | 758 |
Schedule of Net Periodic Benefit Cost | Net periodic benefit cost of the pension and postretirement healthcare plans for the periods ended November 30, 2025 and 2024 included the following components (in millions):
| Three Months Ended
| U.S. Pension Plans |  | International Pension Plans |  | Postretirement Healthcare Plans
| 2025 |  | 2024 |  | 2025 |  | 2024 |  | 2025 |  | 2024
Service cost | $ | 111 |  |  | $ | 124 |  |  | $ | 10 |  |  | $ | 11 |  |  | $ | 7 |  |  | $ | 6 |
Other retirement plans expense (income): |  |  |  |  |  |  |  |  |  |  |
Interest cost | 379 |  |  | 363 |  |  | 11 |  |  | 10 |  |  | 17 |  |  | 16 |
Expected return on plan assets | (457) |  |  | (430) |  |  | (6) |  |  | (7) |  |  | — |  |  | — |
Amortization of prior service credit and other | (2) |  |  | (2) |  |  | — |  |  | 1 |  |  | (1) |  |  | (1) |
| (80) |  |  | (69) |  |  | 5 |  |  | 4 |  |  | 16 |  |  | 15 |
Net periodic benefit cost | $ | 31 |  |  | $ | 55 |  |  | $ | 15 |  |  | $ | 15 |  |  | $ | 23 |  |  | $ | 21 |
| Six Months Ended |
| U.S. Pension Plans |  | International Pension Plans |  | Postretirement Healthcare Plans |
| 2025 |  | 2024 |  | 2025 |  | 2024 |  | 2025 |  | 2024 |
Service cost | $ | 223 |  |  | $ | 249 |  |  | $ | 20 |  |  | $ | 20 |  |  | $ | 14 |  |  | $ | 13 |  |
Other retirement plans expense (income): |  |  |  |  |  |  |  |  |  |  |  |
Interest cost | 757 |  |  | 724 |  |  | 24 |  |  | 22 |  |  | 33 |  |  | 32 |  |
Expected return on plan assets | (914) |  |  | (860) |  |  | (13) |  |  | (12) |  |  | — |  |  | — |  |
Amortization of prior service credit and other | (4) |  |  | (4) |  |  | — |  |  | 1 |  |  | (2) |  |  | (2) |  |
| (161) |  |  | (140) |  |  | 11 |  |  | 11 |  |  | 31 |  |  | 30 |  |
Net periodic benefit cost | $ | 62 |  |  | $ | 109 |  |  | $ | 31 |  |  | $ | 31 |  |  | $ | 45 |  |  | $ | 43 |  |

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- Definition Tabular disclosure of the costs related to the various types of retirement plans including defined benefit pension plan cost, defined contribution plan cost, other postretirement benefit plan cost, and net periodic benefit cost. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 20 -Topic 715 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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