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Significant Accounting Policies - Miscellaneous Income, Net (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Aug. 31, 2019 | Aug. 31, 2018 | Aug. 31, 2017
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items] |  |  |
Gain on sale of business | $ 0.0 | $ 5.4 | $ 0.0
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent | (6.0) | 1.5 |
Gain on sale of investment in unconsolidated affiliate | 0.0 | 0.0 | 7.2
Miscellaneous expense (income), net |  |  |
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items] |  |  |
Income (expense) relating to foreign currency items | 0.6 | 0.1 | $ (0.5)
Foreign Currency Items |  |  |
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items] |  |  |
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent | $ 0.0 | $ 8.7 |

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- Definition Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684 + Details
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