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GOODWILL AND OTHER INTANGIBLES (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Nov. 30, 2020 | Nov. 30, 2019 | Aug. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |
Gross carrying amounts of the intangible assets subject to amortization | $ 21.8 |  | $ 22.1
Net carrying amount of intangible assets subject to amortization | 12.0 |  | 12.6
Carrying amount of acquired unfavorable contract backlog liability | 4.5 |  | $ 6.0
Amortization of unfavorable contract backlog | $ 1.5 | $ 8.3 |

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