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Intangibles and Other Assets, Net - Identifiable Intangible and Other Assets (Detail) - USD ($) $ in Millions | Feb. 28, 2023 | Aug. 31, 2022
--- | --- | ---
Intangibles and Other Assets by Major Class [Line Items] |  |
Finite-Lived Intangible Assets, Net, Total | $ 43.0 | $ 47.3
Intangible assets not subject to amortization | 2.4 | 2.4
Prepaid and other assets | 76.4 | 32.4
Operating lease ROU assets | $ 50.0 | $ 54.2
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Total Intangible and other assets, net | Total Intangible and other assets, net
Nonqualified savings plan investments | $ 45.1 | $ 40.3
Debt issuance costs, net | 6.8 | 8.7
Assets held for sale | 0.3 | 3.8
Total Intangible and other assets, net | 224.0 | 189.1
Customer Relationships |  |
Intangibles and Other Assets by Major Class [Line Items] |  |
Finite lived intangible assets gross | 87.5 | 87.5
Accumulated amortization | (67.6) | (66.1)
Other Intangible Assets |  |
Intangibles and Other Assets by Major Class [Line Items] |  |
Finite lived intangible assets gross | 42.7 | 42.4
Accumulated amortization | $ (19.6) | $ (16.5)

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