Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Cash Flow from Operating Activities
Net earnings	$ 25,400,000	$ 98,600,000	$ 114,700,000
Depreciation, Depletion and Amortization	88,800,000	88,000,000.0	91,400,000
Goodwill, Impairment Loss	51,100,000
Share-based compensation expense	24,500,000	26,500,000	27,500,000
Deferred income taxes	(21,700,000)	(9,600,000)	(4,500,000)
Deferred compensation payments	(3,100,000)	(2,100,000)	(4,900,000)
Defined benefit settlement loss	1,900,000	700,000	2,500,000
Defined benefit settlement loss	0	0	(7,900,000)
Other, net	(22,700,000)	(18,700,000)	(23,500,000)
Increase (Decrease) in Accounts Receivable	15,300,000	7,300,000	(31,000,000.0)
Increase (Decrease) in Inventories	100,000	19,700,000	(32,400,000)
Increase (Decrease) in Other Current Assets	2,600,000	(4,700,000)	(20,800,000)
Increase (Decrease) in Accounts Payable, Trade	3,300,000	17,000,000.0	(30,200,000)
Increase (Decrease) in Other Current Liabilities	(11,300,000)	13,500,000	15,800,000
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation, Total	118,400,000	(231,000,000.0)	(216,100,000)
Cash flow from Investing Activities
Payments to Acquire Productive Assets	77,000,000.0	56,500,000	49,500,000
Proceeds from Collection of Retained Interest in Securitized Receivables	5,600,000	700,000	2,700,000
Payment for (Proceeds from) Other Investing Activity	1,500,000	(6,600,000)	(3,700,000)
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation, Total	(72,900,000)	(62,400,000)	(50,500,000)
Cash flow from Financing Activities
Proceeds from Long-Term Lines of Credit	931,000,000.0	813,000,000.0	841,000,000.0
Repayments of Long-Term Lines of Credit	825,000,000.0	901,000,000.0	874,000,000.0
Proceeds from (Repayments of) Short-Term Debt, Maturing in Three Months or Less	5,500,000	4,200,000	0
Payments for Repurchase of Common Stock	90,200,000	58,500,000	75,200,000
Payments of Dividends	29,300,000	30,700,000	31,500,000
Payment, Tax Withholding, Share-Based Payment Arrangement	7,500,000	7,300,000	9,000,000.0
Proceeds from (Repayments of) Accounts Receivable Securitization	(14,100,000)	5,200,000	2,300,000
Other, net	(400,000)	(4,300,000)	(100,000)
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation, Total	(30,000,000.0)	(179,400,000)	(146,500,000)
Cash and cash equivalents, beginning	209,100,000	216,400,000	188,700,000
Cash and cash equivalents, ending	225,700,000	209,100,000	216,400,000
Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation	1,100,000	3,500,000	8,600,000
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation, Total	16,600,000	(7,300,000)	27,700,000
Supplemental Cash Flow Information [Abstract]
Cash paid for interest, net	73,300,000	62,800,000	74,300,000
Cash paid for income taxes, net	$ 25,500,000	$ 33,500,000	$ 45,800,000