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Fair Value Measurements (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
May 31, 2021 | May 31, 2020 | Aug. 31, 2020
Fair Value Disclosures [Abstract] |  |  |
Cash and cash equivalents | $ 593.5 |  | $ 560.7
Liabilities: |  |  |
Asset impairment | 4.0 | $ 1.4 |
Carrying Value |  |  |
Liabilities: |  |  |
Investments in unconsolidated affiliates | 7.3 |  | 6.0
Carrying Value | Unsecured debt | Senior unsecured public notes, net of unamortized discount and deferred costs |  |  |
Liabilities: |  |  |
Carrying and estimated fair values of financial instruments | 494.2 |  | 0.0
Carrying Value | Unsecured debt | Unsecured Delayed Draw Term Loan |  |  |
Liabilities: |  |  |
Carrying and estimated fair values of financial instruments | 0.0 |  | 395.0
Carrying Value | Industrial revenue bond | Industrial Revenue Bond Maturing in 2021 [Member] |  |  |
Liabilities: |  |  |
Carrying and estimated fair values of financial instruments | 4.0 |  | 4.0
Carrying Value | Bank loans | Bank loans |  |  |
Liabilities: |  |  |
Carrying and estimated fair values of financial instruments | 0.0 |  | 2.1
Fair Value |  |  |
Liabilities: |  |  |
Investments in unconsolidated affiliates | 7.3 |  | 6.0
Fair Value | Unsecured debt | Senior unsecured public notes, net of unamortized discount and deferred costs |  |  |
Liabilities: |  |  |
Carrying and estimated fair values of financial instruments | 490.1 |  | 0.0
Fair Value | Unsecured debt | Unsecured Delayed Draw Term Loan |  |  |
Liabilities: |  |  |
Carrying and estimated fair values of financial instruments | 0.0 |  | 395.0
Fair Value | Industrial revenue bond | Industrial Revenue Bond Maturing in 2021 [Member] |  |  |
Liabilities: |  |  |
Carrying and estimated fair values of financial instruments | 4.0 |  | 4.0
Fair Value | Bank loans | Bank loans |  |  |
Liabilities: |  |  |
Carrying and estimated fair values of financial instruments | $ 0.0 |  | $ 2.3

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- Definition Fair value portion of investments in an entity not consolidated. Includes, but is not limited to, investments in an entity that is affiliated with the reporting entity by means of direct or indirect ownership, an entity in which the reporting entity shares control of the entity with another party or group, an entity which the company has significant influence, but does not have control and subsidiaries that are not required to be consolidated and are accounted for using the equity or cost method. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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