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STOCK-BASED COMPENSATION PLANS (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
May 31, 2016 | May 31, 2015 | May 31, 2016 | May 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | $ 6.8 | $ 6.5 | $ 19.9 | $ 18.3
Restricted stock units and performance stock units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares granted |  |  | 1,600,000 | 1,100,000
Weighted average grant-date fair value |  |  | $ 15.83 | $ 15.92
Liability awards |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares granted |  |  | 464,782 | 392,517
Equivalent shares outstanding | 914,215 |  | 914,215 |
Equivalent shares expected to vest | 870,224 |  | 870,224 |
Fiscal 2016 | Restricted stock units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period in years |  |  | 3 years |
Fiscal 2016 | Performance stock units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period in years |  |  | 3 years |
Fiscal 2015 | Restricted stock units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period in years |  |  | 3 years |
Fiscal 2015 | Certain restricted stock units | Vesting on second anniversary |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage |  |  | 33.33% |
Fiscal 2015 | Certain restricted stock units | Vesting on third anniversary |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage |  |  | 66.66% |
Fiscal 2015 | Performance stock units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period in years |  |  | 3 years |
Fiscal 2014 | Certain restricted stock units | Vesting on second anniversary |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage |  |  | 25.00% |
Fiscal 2014 | Certain restricted stock units | Vesting on third anniversary |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage |  |  | 25.00% |
Fiscal 2014 | Certain restricted stock units | Vesting on fourth anniversary |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage |  |  | 50.00% |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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