CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME (Condensed) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Net sales	$ 663.3	$ 684.1	$ 1,379.9	$ 1,449.2
Cost of products sold	410.0	430.8	859.6	897.6
Gross profit	253.3	253.3	520.3	551.6
Selling, general and administrative expense	122.5	118.3	250.6	238.7
Advertising and sales promotion expense	21.4	18.4	68.4	71.8
Research and development expense	7.9	8.0	15.7	15.6
Amortization of intangible assets	14.5	14.5	29.0	30.5
Interest expense	38.7	42.0	79.4	84.9
Loss/(gain) on extinguishment of debt			0.9	(2.0)
Other items, net	5.5	0.8	24.5	(0.6)
(Loss)/Earnings before income taxes	42.4	50.4	51.8	112.7
Income tax (benefit)/provision	10.0	10.4	17.5	23.7
Net earnings	$ 32.4	$ 40.0	$ 34.3	$ 89.0
Earnings Per Share
Basic net (loss)/earnings per common share- continuing operations (in dollars per share)	$ 0.45	$ 0.56	$ 0.48	$ 1.25
Diluted net (loss)/earnings per common share- continuing operations (in dollars per share)	$ 0.45	$ 0.55	$ 0.47	$ 1.23
Weighted average number of shares outstanding, basic (in shares)	71.8	71.5	71.7	71.4
Weighted average number of shares outstanding, diluted (in shares)	72.6	72.4	72.6	72.3
Statement of Comprehensive Income
Net (loss)/earnings	$ 32.4	$ 40.0	$ 34.3	$ 89.0
Other comprehensive income/(loss), net of tax (benefit)/expense
Foreign currency translation adjustments	(2.5)	1.4	(3.6)	(17.2)
Pension activity, net of tax of $(2.9) in 2022, $8.7 in 2021, and $3.5 in 2020	1.3	0.7	0.4	3.1
Deferred gain/(loss) on hedging activity, net of tax of $19.1 in 2022, $6.4 in 2021, and $(1.5) in 2020	4.7	(10.8)	(14.9)	(24.2)
Total comprehensive (loss)/income	$ 35.9	$ 31.3	$ 16.2	$ 50.7