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Short-term Financing (Description of Credit Facilities) (Parenthetical) (Details) - Revolving Credit Facility [Member] - USD ($) $ in Millions | May 31, 2025 | May 31, 2024
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Line of Credit Facility [Line Items] |  |
Maximum Amount Available | $ 2,000.0 |
PNC Bank, National Association [Member] | PNC $250 Million Credit Facility [Member] |  |
Line of Credit Facility [Line Items] |  |
Weighted-average interest rate | 3.87% | 6.14%
Maximum Amount Available | $ 250.0 |

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