Restructuring Charges (Schedule of Restructuring Activities and Related Accruals) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Restructuring Reserve [Roll Forward]
Restructuring reserve	$ 21.4
Restructuring reserve	16.7	$ 21.4
Operating Model Redesign
Restructuring Reserve [Roll Forward]
Restructuring reserve	2.7
Consolidation of Mexico Facilities
Restructuring Reserve [Roll Forward]
Restructuring reserve	14.0
Severance and related benefit costs
Restructuring Reserve [Roll Forward]
Restructuring reserve	20.7	3.9
Restructuring charges, charge to income	7.1	26.4
Utilized - cash payments	(9.9)	(9.6)
Utilized - non cash	(1.9)
Restructuring reserve	16.0	20.7
Severance and related benefit costs | Operating Model Redesign
Restructuring Reserve [Roll Forward]
Restructuring reserve	5.1	3.9
Restructuring charges, charge to income	6.8	10.8
Utilized - cash payments	(7.9)	(9.6)
Utilized - non cash	(1.3)
Restructuring reserve	2.7	5.1
Severance and related benefit costs | Consolidation of Mexico Facilities
Restructuring Reserve [Roll Forward]
Restructuring reserve	15.6	0.0
Restructuring charges, charge to income	0.3	15.6
Utilized - cash payments	(2.0)	0.0
Utilized - non cash	(0.6)
Restructuring reserve	13.3	15.6
Asset impairment and accelerated depreciation
Restructuring Reserve [Roll Forward]
Restructuring charges, charge to income	5.8
Utilized - non cash	(5.8)
Asset impairment and accelerated depreciation | Operating Model Redesign
Restructuring Reserve [Roll Forward]
Restructuring charges, charge to income	1.7
Utilized - non cash	(1.7)
Asset impairment and accelerated depreciation | Consolidation of Mexico Facilities
Restructuring Reserve [Roll Forward]
Restructuring charges, charge to income	4.1
Utilized - non cash	(4.1)
Other exit costs
Restructuring Reserve [Roll Forward]
Restructuring reserve	0.7	0.7
Restructuring charges, charge to income	40.2	9.6
Utilized - cash payments	(38.7)	(9.6)
Utilized - non cash	(1.5)
Restructuring reserve	0.7	0.7
Other exit costs | Operating Model Redesign
Restructuring Reserve [Roll Forward]
Restructuring reserve	0.7	0.7
Restructuring charges, charge to income	10.6	9.6
Utilized - cash payments	(10.6)	(9.6)
Utilized - non cash	(0.7)
Restructuring reserve	0.0	0.7
Other exit costs | Consolidation of Mexico Facilities
Restructuring Reserve [Roll Forward]
Restructuring reserve	0.0	0.0
Restructuring charges, charge to income	29.6	0.0
Utilized - cash payments	(28.1)	0.0
Utilized - non cash	(0.8)
Restructuring reserve	$ 0.7	$ 0.0