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Divestiture Activities - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2024
Apr. 30, 2023
Apr. 30, 2024
Apr. 30, 2023
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Proceeds from sale of business     $ 318.2 $ 0.6
Selling, general and administrative expenses $ 50.1 $ 52.5 105.5 $ 120.3
Fire RTC [Member]        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Gain (loss) on sale of business $ 1.5   1.5  
Sale of Collins [Member]        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Gain (loss) on sale of business     257.5  
Proceeds from sale of business     308.2  
Sale of Collins [Member] | Selling, General and Administrative Expenses [Member]        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Transaction costs     $ 5.0