Consolidated Statements Of Operations - USD ($) shares in Thousands, $ 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	$ 353.4	$ 332.9	$ 609.8	$ 647.7
Cost of sales	223.0	235.1	393.1	456.7
Gross profit	130.4	97.8	216.7	191.0
Operating expenses:
Selling, general and administrative	63.7	64.2	120.6	127.1
Restructuring and other charges	3.2	0.7	9.8	(3.0)
Total operating expenses	66.9	64.9	130.4	124.1
Operating income	63.5	32.9	86.3	66.9
Non-operating expense:
Pension costs (benefits) other then service	1.0	1.0	2.0	1.9
Interest expense, net	3.6	3.9	6.9	7.6
Other expense	0.0	0.0	1.6	0.0
Net other expense	4.6	4.9	10.5	9.5
Income before income taxes	58.9	28.0	75.8	57.4
Income tax expense (benefit)	14.6	6.7	17.2	13.6
Net income (loss)	$ 44.3	$ 21.3	$ 58.6	$ 43.8
Net income (loss) per basic share:
Earnings Per Share, Basic	$ 0.28	$ 0.14	$ 0.38	$ 0.28
Net income (loss) per diluted share:
Earnings Per Share, Diluted	$ 0.28	$ 0.14	$ 0.37	$ 0.28
Weighted average shares outstanding:
Basic, in shares	156,000	156,300	156,000	157,900
Diluted, in shares	156,700	156,900	156,600	158,500
Dividends declared per share, in dollars per share	$ 0.064	$ 0.061	$ 0.128	$ 0.122