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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, 2023
Aug. 31, 2022
Deferred tax assets:    
Accrued payroll and related liabilities $ 37.1 $ 27.6
Deferred revenue 6.6 6.7
Inventories and other 12.4 9.8
Maintenance and warranty accruals 3.5 3.2
Lease liability 16.5 12.4
Net operating losses 18.4 19.6
Investment, asset tax credits and other 0.9 1.5
Deferred Tax Assets, Gross, Total 95.4 80.8
Valuation allowance (9.6) (9.9)
Deferred tax liabilities:    
Fixed assets (131.9) (110.6)
Intangibles (5.1) (5.3)
Right-of-use asset (16.0) (11.9)
Other (13.8) (11.7)
Deferred Tax Liabilities, Gross, Total (166.8) (139.5)
Net deferred tax liability $ (81.0) $ (68.6)