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Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Disaggregation Of Revenue [Line Items]
Unsatisfied performance obligation amount	$ 11.3	$ 7.0
Revenue recognized	13.7
Other Current Assets [Member]
Disaggregation Of Revenue [Line Items]
Contract assets	0.9	1.3
Other Current and Noncurrent Liabilities [Member]
Disaggregation Of Revenue [Line Items]
Contract liabilities	$ 19.6	$ 18.4

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Contract with customer unsatisfied performance obligation amount.

+ References

No definition available.

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- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=121556615&loc=SL49130531-203044

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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.

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