Condensed Consolidated Statements of Earnings and Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net sales	$ 573.7	$ 483.9	$ 1,544.1	$ 1,460.9
Cost of products sold	303.4	261.2	838.8	802.1
Gross profit	270.3	222.7	705.3	658.8
Selling, general and administrative expense	97.5	91.3	284.0	307.8
Advertising and sales promotion expense	81.9	67.5	191.5	155.6
Research and development expense	14.6	12.4	42.6	40.1
Restructuring charges	5.2	8.0	11.6	20.6
Operating income	71.1	43.5	175.6	134.7
Gain on sale of Infant and Pet Care business	0.0	0.0	0.0	(4.1)
Interest expense associated with debt	16.4	15.5	51.1	43.7
Cost of early retirement of long-term debt	0.0	26.2	26.1	26.2
Other expense (income), net	0.8	(3.5)	(0.2)	5.8
Earnings before income taxes	53.9	5.3	98.6	63.1
Income tax provision	13.1	0.6	25.7	16.5
Net earnings	$ 40.8	$ 4.7	$ 72.9	$ 46.6
Basic net earnings per share	$ 0.75	$ 0.09	$ 1.34	$ 0.86
Diluted net earnings per share	$ 0.74	$ 0.09	$ 1.32	$ 0.86
Condensed Consolidated Statements of Comprehensive Income
Net earnings	$ 40.8	$ 4.7	$ 72.9	$ 46.6
Other comprehensive income (loss), net of tax
Foreign currency translation adjustments	9.1	14.5	23.0	8.1
Pension and postretirement activity, net of tax	(0.7)	(1.1)	(1.3)	(1.8)
Deferred gain (loss) on hedging activity, net of tax	0.2	(1.8)	3.5	(1.5)
Total other comprehensive income, net of tax	8.6	11.6	25.2	4.8
Total comprehensive income	$ 49.4	$ 16.3	$ 98.1	$ 51.4