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Debt - Accounts Receivable Securitization Facility (Details) - USD ($) | 6 Months Ended
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Oct. 31, 2019 | Apr. 30, 2019
Forecast | Energy Services | Receivables Facility | Energy Services Receivables Facility |  |
Short-term Debt |  |
Maximum borrowing capacity | $ 75,000,000 | $ 150,000,000

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- Definition Receivables Facility, Maximum Borrowing Capacity + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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