Consolidated Statements of Earnings and Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
OCI Pension and postretirement activity, net of tax	$ (7.0)	$ 0.6	$ (2.7)
OCI gain (loss) on cash flow hedge, tax	0.3	(2.2)	(2.2)
Net earnings	25.4	98.6	114.7
Cost of products sold	1,298.6	1,298.0	1,310.8
Gross profit	924.9	955.7	940.8
Advertising and sales promotion expense	246.7	232.0	229.1
Research and development expense	57.6	58.4	58.5
Restructuring charges	47.9	35.9	16.6
Operating income	96.6	199.3	227.0
Interest expense associated with debt	73.2	76.5	78.5
Nonoperating Income (Expense)	0.2	(1.9)	(0.8)
Earnings before income taxes	23.6	120.9	147.7
Income tax (benefit) provision	(1.8)	22.3	33.0
Net sales	$ 2,223.5	$ 2,253.7	$ 2,251.6
Basic	$ 0.53	$ 1.98	$ 2.24
Diluted	$ 0.53	$ 1.97	$ 2.21
Foreign currency translation adjustments	$ 27.0	$ 18.6	$ 44.3
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	(17.2)	(1.2)	(6.6)
Deferred gain (loss) on hedging activity, net of tax	0.8	(4.6)	(4.8)
Other Comprehensive Income (Loss), Net of Tax	45.0	15.2	46.1
Total comprehensive income (loss)	$ 70.4	$ 113.8	$ 160.8