Share-Based Compensation (Details) $ in Millions	3 Months Ended
Nov. 30, 2016 USD ($) company shares
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	142,635
Shares granted, fair value \| $	$ 3
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	134,899
Performance Shares \| Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	65,506
Shares granted, fair value \| $	$ 2
Total Shareholder Return Designated Peer Group \| company	16
Performance Shares \| Total Shareholder Return \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Based Awards Award Payouts Threshold	50.00%
Performance Shares \| Total Shareholder Return \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Based Awards Award Payouts Threshold	200.00%
Performance Shares \| Cash Flow Return on Investment
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	69,393
Shares granted, fair value \| $	$ 2
Performance period	3 years
Performance Shares \| Cash Flow Return on Investment \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Based Awards Award Payouts Threshold	50.00%
Performance Shares \| Cash Flow Return on Investment \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance Based Awards Award Payouts Threshold	200.00%

Performance Based Awards Award Payouts Threshold

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Total Fair Value

+ References

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- Definition

TSR Designated Peer Group

+ References

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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.

+ References

No definition available.

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