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RETIREMENT PLANS - Additional Information (Details) - USD ($) | 12 Months Ended
--- | ---
May 31, 2026 | May 31, 2025 | May 31, 2024 | May 31, 2023 | May 31, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
U.S. pension plan actual rate of return on assets |  | 6.50% | 6.80% | (2.70%) |
Weighted average discount rate percent all pension postretirement plans |  | 5.87% | 5.53% | 5.17% | 4.21%
Pension plan, service period |  | 1 year |  |  |
Actual rate of return on plan assets for the 15-year period |  | 6.90% |  |  |
Amortization of prior service cost in our U.S. pension plans, before tax, after Tax |  | $ 5,000,000 | $ 8,000,000 | $ 10,000,000 |
Defined benefit plan health care cost trend rate assumed for next fiscal year |  | 6.90% |  |  |
Defined benefit plan ultimate health care cost trend rate |  | 4.00% |  |  |
Future Plan Structure | Maximum |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Company matching contributions to eligible employees |  | 8.00% |  |  | 8.00%
Current Plan Structure | Maximum |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Company matching contributions to eligible employees |  | 3.50% |  |  |
U.S. Pension Plans | Pension Plan |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Expected long-term rate of return on assets |  | 6.75% | 6.50% | 6.50% |
Required contributions |  | $ 0 | $ 0 |  |
Voluntary contributions |  | 800,000,000 | 800,000,000 |  |
Amortization of prior service cost in our U.S. pension plans, before tax |  | 8,000,000 | 7,000,000 |  |
Amortization of prior service cost in our U.S. pension plans, before tax, after Tax |  | $ 6,000,000 | $ 6,000,000 |  |
U.S. Pension Plans | Pension Plan | Forecast |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Required contributions | $ 0 |  |  |  |
Voluntary contributions | $ 600,000,000 |  |  |  |

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- Definition The actual rate of return on plan assets for the 15-year period reflecting the average rate of earnings on the funds invested to provide for the benefits included in the benefit obligation. + References No definition available. + Details
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- Definition U.S. pension plan actual rate of return on assets. + References No definition available. + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (j)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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