Condensed Consolidated Statements of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Net Income (Loss) Attributable to Parent [Abstract]
Net revenues	$ 414.3	$ 373.4
Cost of sales	261.4	238.6
Gross profit	152.9	134.8
Selling, general and administrative expenses	82.8	74.5
Net legacy and separation-related expenses	0.4	0.1
Other income, net	(74.1)	(2.6)
Operating income	143.8	62.8
Net pension and other postretirement plan (income) expenses	(0.9)	3.4
Net interest and other financing expenses	17.5	13.6
Income before income taxes	127.2	45.8
Income tax expense	33.3	11.9
Income from continuing operations	93.9	33.9
Loss from discontinued operations, net of tax	(2.3)	(2.0)
Net income	$ 91.6	$ 31.9
NET EARNINGS PER SHARE
Continuing operations, basic earnings (loss) per share (usd per share)	$ 0.73	$ 0.26
Discontinued operations, basic earnings (loss) per share (usd per share)	(0.02)	(0.02)
Basic earnings per share (usd per share)	0.71	0.24
Continuing operations, diluted earnings (loss) per share (usd per share)	0.73	0.26
Discontinued operations, diluted earnings (loss) per share (usd per share)	(0.02)	(0.02)
Diluted earnings per share (usd per share)	$ 0.71	$ 0.24
Weighted average common shares outstanding
Basic (in shares)	128.7	131.8
Diluted (in shares)	129.5	132.7
COMPREHENSIVE INCOME
Net income	$ 91.6	$ 31.9
Other comprehensive (loss) income, net of tax
Currency translation adjustments	(6.5)	6.6
Amortization of pension and other postretirement plan prior service credits	(0.4)	(0.5)
Unrealized loss on cash flow hedges	0.0	(1.9)
Other comprehensive (loss) income	(6.9)	4.2
Comprehensive income	$ 84.7	$ 36.1