Fair Value Measurements (Assets Held For Sale Measured At Fair Value) (Details) - Fair Value, Nonrecurring - Level 2 - USD ($)	6 Months Ended
Feb. 29, 2020	Aug. 31, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Impairment charges on Assets held for sale	$ 0
Carrying Amount
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets held for sale (1)	$ 30,120,000	$ 0

The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2611-110228

Name:	us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration