Business Segment Information - Schedule of Selected Financial Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Segment Reporting Information [Line Items]
Net Sales	$ 2,277.6	$ 2,403.7	$ 2,381.3
Depreciation and amortization	40.2	45.7	46.0
Capital expenditures	13.5	20.8	40.6
Total assets	1,312.3	1,347.1	1,408.1
Fire & Emergency [Member]
Segment Reporting Information [Line Items]
Net Sales	1,132.0	967.9	956.6
Commercial [Member]
Segment Reporting Information [Line Items]
Net Sales	484.8	720.0	638.5
Recreation [Member]
Segment Reporting Information [Line Items]
Net Sales	657.8	716.3	811.9
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Net Sales			(25.7)
Depreciation and amortization			7.3
Capital expenditures			18.8
Total assets			119.3
Adjusted EBITDA	(45.3)	(43.9)	(36.5)
Operating Segment [Member] | Fire & Emergency [Member]
Segment Reporting Information [Line Items]
Net Sales	1,132.0	967.9	956.6
Depreciation and amortization	13.5	14.1	15.3
Capital expenditures	7.1	8.6	7.9
Total assets	731.3	617.2	612.4
Adjusted EBITDA	39.9	43.2	86.0
Operating Segment [Member] | Commercial [Member]
Segment Reporting Information [Line Items]
Net Sales	484.8	720.0	638.5
Depreciation and amortization	5.7	8.7	10.0
Capital expenditures	2.7	3.7	4.2
Total assets	207.1	317.7	293.2
Adjusted EBITDA	34.5	56.0	38.1
Operating Segment [Member] | Recreation [Member]
Segment Reporting Information [Line Items]
Net Sales	657.8	716.3	811.9
Depreciation and amortization	13.7	15.6	13.4
Capital expenditures	2.0	2.7	9.7
Total assets	305.4	316.4	383.2
Adjusted EBITDA	38.4	46.8	$ 60.4
Corporate, Other and Elims [Member]
Segment Reporting Information [Line Items]
Net Sales	3.0	(0.5)
Depreciation and amortization	7.3	7.3
Capital expenditures	1.7	5.8
Total assets	68.5	95.8
Adjusted EBITDA	$ (45.3)	$ (43.9)