Consolidated Statements of Earnings and Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Net sales	$ 534.1	$ 650.0	$ 598.4	$ 469.1	$ 536.9	$ 623.8	$ 547.7	$ 463.3	$ 2,251.6	$ 2,171.7	$ 2,087.3
Cost of products sold									1,310.8	1,291.2	1,136.1
Gross profit	228.6	280.3	242.3	189.6	219.0	240.9	230.4	190.2	940.8	880.5	951.2
Selling, general and administrative expense									409.6	389.1	391.2
Advertising and sales promotion expense									229.1	238.3	241.5
Research and development expense									58.5	55.5	57.8
Restructuring charges									16.6	15.3	20.8
Operating income									227.0	182.3	239.9
Cost of early retirement of long-term debt									0.0	0.0	26.1
Interest expense associated with debt									78.5	71.4	67.9
Other expense (income), net									0.8	(13.2)	(1.2)
Earnings before income taxes									147.7	124.1	147.1
Income tax provision									33.0	24.6	29.3
Net earnings	$ 29.9	$ 53.0	$ 19.4	$ 12.4	$ 33.7	$ 30.8	$ 23.5	$ 11.5	$ 114.7	$ 99.5	$ 117.8
Basic net earnings per share	$ 0.59	$ 1.04	$ 0.38	$ 0.24	$ 0.65	$ 0.59	$ 0.43	$ 0.21	$ 2.24	$ 1.87	$ 2.17
Dilutive net earnings per share	$ 0.58	$ 1.02	$ 0.37	$ 0.24	$ 0.64	$ 0.58	$ 0.43	$ 0.20	$ 2.21	$ 1.85	$ 2.13
Condensed Consolidated Statements of Comprehensive Income
Net earnings	$ 29.9	$ 53.0	$ 19.4	$ 12.4	$ 33.7	$ 30.8	$ 23.5	$ 11.5	$ 114.7	$ 99.5	$ 117.8
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments									44.3	(89.4)	5.6
Pension and postretirement activity, net of tax									6.6	4.7	44.8
Deferred gain (loss) on hedging activity, net of tax									(4.8)	5.5	4.3
Total other comprehensive income (loss), net of tax									46.1	(79.2)	54.7
Total comprehensive income									$ 160.8	$ 20.3	$ 172.5