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Income Taxes - Tax Effects of Temporary Differences that give rise to Significant Portions of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($)
$ in Millions
Aug. 31, 2022
Aug. 31, 2021
Deferred tax assets:    
Accrued payroll and related liabilities $ 27.6 $ 23.7
Deferred revenue 6.7 7.4
Inventories and other 9.8 16.8
Maintenance and warranty accruals 3.2 2.5
Lease liability 12.4 8.5
Net operating losses 19.6 15.9
Investment, asset tax credits and other 1.5 1.4
Deferred Tax Assets, Gross, Total 80.8 76.2
Valuation allowance (9.9) (10.4)
Deferred tax liabilities:    
Fixed assets (110.6) (106.1)
Original issue discount (0.1) (17.1)
Intangibles (5.3) (3.0)
Right-of-use asset (11.9) (8.9)
Other (11.7) (4.0)
Deferred Tax Liabilities, Gross, Total (139.5) (139.1)
Net deferred tax liability $ (68.6) $ (73.3)