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Income Taxes and Other Taxes (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Nov. 30, 2022 | Nov. 30, 2021 | Aug. 31, 2021 | Nov. 30, 2022 | Nov. 30, 2021
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Effective income tax rate (percentage) | 25.30% | 23.20% |  | 30.20% | 21.10%
Tax Years 2015 to 2020 |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Income taxes receivable | $ 20.0 |  |  | $ 20.0 |
Employee Retention Credits |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Income taxes receivable | $ 10.1 |  |  | $ 10.1 |
Carry Back of Net Operating Losses |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Proceeds from Income Tax Refunds |  |  | $ 63.1 |  |

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- Definition Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Also called income tax refund receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(8)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(10)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition The amount of cash received during the period as refunds for the overpayment of taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4297-108586 + Details
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