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STOCK-BASED COMPENSATION PLANS (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Feb. 29, 2016 | Feb. 28, 2015 | Feb. 29, 2016 | Feb. 28, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | $ 6.8 | $ 6.1 | $ 13.1 | $ 11.8
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 | 1,000,000
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 | 917,968 |  | 917,968 |
Equivalent shares expected to vest | 873,789 |  | 873,789 |
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 |  |  | 33.00% |
Fiscal 2015 | Certain restricted stock units | Vesting on third anniversary |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting percentage |  |  | 67.00% |
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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