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SUPPLEMENTAL CASH FLOW INFORMATION - Schedule of Noncash Investing and Financing Activities (Details) - USD ($) $ in Millions | 12 Months Ended
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May 31, 2025 | May 31, 2024 | May 31, 2023
RouteSmart Technologies, Inc. |  |  |
Cash and Cash Equivalents [Line Items] |  |  |
Shares of common stock issued from treasury stock for acquisition | $ 90 | $ 0 | $ 0

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