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Supplemental Information (Narrative) (Details) - USD ($) $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Sep. 01, 2021 | Aug. 31, 2021 | Aug. 31, 2020 | May 31, 2021
Amortization of operating lease right-of-use assets |  |  | $ 24.4 |
Loss on disposal |  |  | 5.1 |
Depreciation expense |  | $ 30.7 | 31.3 |
Amortization expense |  | 15.0 | 18.3 |
Impairment loss relates to goodwill or intangible assets |  | 0.0 | 0.0 |
Revolving Credit Facility [Member] |  |  |  |
Unused amount available |  | $ 1,700.0 |  |
Weighted-average interest rate |  | 1.17% |  | 1.16%
Standby Letters of Credit [Member] |  |  |  |
Maximum borrowing capacity |  | $ 139.6 |  | $ 180.4
Amounts outstanding |  | $ 0.0 | $ 0.0 | $ 0.0
Standby Letters of Credit [Member] | Minimum [Member] |  |  |  |
Expiration date |  | Nov. 17, 2021 |  |
Standby Letters of Credit [Member] | Maximum [Member] |  |  |  |
Expiration date |  | Dec. 05, 2022 |  |
JPM $1 Billion Credit Facility [Member] | JP Morgan Chase Bank, N.A. [Member] | Revolving Credit Facility [Member] |  |  |  |
Maximum borrowing capacity |  | $ 1,000.0 |  |
JPM $500 Million Credit Facility [Member] | JP Morgan Chase Bank, N.A. [Member] | Revolving Credit Facility [Member] |  |  |  |
Maximum borrowing capacity |  | $ 500.0 |  |
JPM $750 Million Credit Facility [Member] | JP Morgan Chase Bank, N.A. [Member] | Revolving Credit Facility [Member] | Subsequent Event [Member] |  |  |  |
Maximum borrowing capacity | $ 750.0 |  |  |
Expiration date | Sep. 17, 2026 |  |  |

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