Short-term Financing (Lines of Credit Facility Amount Borrowed) (Details) - Revolving Credit Facility [Member] - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
Feb. 28, 2017 |
Feb. 28, 2017 |
Feb. 29, 2016 |
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| JP Morgan Chase Bank, NA [Member] | |||
| Line of Credit Facility [Line Items] | |||
| Number of days borrowed | 8 days | 27 days | 3 days |
| Maximum amount borrowed | $ 250.0 | $ 350.0 | $ 350.0 |
| Weighted-average amount borrowed | $ 81.3 | $ 183.3 | $ 217.0 |
| Weighted-average interest rate | 2.24% | 2.68% | 3.25% |
| PNC Bank, National Association [Member] | |||
| Line of Credit Facility [Line Items] | |||
| Number of days borrowed | 90 days | 267 days | |
| Maximum amount borrowed | $ 55.6 | $ 55.6 | |
| Weighted-average amount borrowed | $ 55.3 | $ 52.6 | |
| Weighted-average interest rate | 1.27% | 1.13% | |
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- Definition Line of Credit Facility, Number Of Days Borrowed No definition available.
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- Definition Average amount borrowed under the credit facility during the period. No definition available.
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- Definition The effective interest rate during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Maximum amount borrowed under the credit facility at any time during the period. No definition available.
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