Supplemental Balance Sheet Information (Schedule Of Selected Supplemental Balance Sheet Information) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2020	Sep. 30, 2019
Accrued liabilities	$ 84.8	$ 93.0
Goodwill	96.4	95.7
Goodwill, Purchase Accounting Adjustments	0.3
Goodwill, Foreign Currency Translation Gain (Loss)	0.4
Other noncurrent liabilities	49.6	33.2
Nontrade Receivables, Noncurrent	1.8	1.8
Estimated Litigation Liability	10.1	0.2
Inventories:
Purchased components and raw material	97.8	95.2
Work in process	32.9	43.7
Finished goods	49.6	52.5
Inventories, net	180.3	191.4
Maintenance and repair tooling	3.9	4.2
Income taxes	0.2	4.7
Other	0.7	1.2
Other	28.1	26.0
Property, plant and equipment:
Land	6.5	5.2
Buildings	77.0	68.9
Machinery and equipment	396.2	362.9
Construction in progress	54.5	48.0
Property, plant and equipment, gross	534.2	485.0
Accumulated depreciation	(289.3)	(267.9)
Property, plant and equipment net	244.9	217.1
Other current liabilities:
Compensation and benefits	29.1	28.5
Interest	1.1	7.3
Warranty	6.7	6.5
Environmental	1.2	1.2
Restructuring	1.9	1.7
Walter accrual	0.0	22.0
Income taxes	4.4	0.6
Taxes other than income taxes	3.6	3.3
Asset Retirement Obligation	3.3	3.6
Customer rebates	8.5	8.7
Other Liabilities, Current	3.8	5.0
Prepaid Expense	11.1	9.6
Nontrade Receivables	12.2	6.3
Operating Lease, Right-of-Use Asset	26.3	0.0
Other noncurrent assets	51.2	23.9
Other Assets	2.5	2.6
Operating Lease, Liability, Current	4.2	0.0
Deferred Revenue	5.4	4.7
Operating Lease, Liability	28.0
Customer Refund Liability, Current	4.8	3.3
Operating Lease, Liability, Noncurrent	23.8	0.0
Transition Tax Liability	4.1	5.8
Unrecognized Tax Benefits	3.5	3.3
Liability, Defined Benefit Pension Plan, Noncurrent	1.8	5.0
Workers' Compensation Liability, Noncurrent	1.2	1.9
Other Accrued Liabilities, Noncurrent	3.4	2.9
Other noncurrent liabilities	49.6	33.2
Standard Product Warranty Accrual, Noncurrent	8.5	10.7
Nontrade Receivables, Noncurrent	1.8	1.8
Other Assets, Miscellaneous, Noncurrent	17.5	16.4
Workers Compensation Reimbursement
Nontrade Receivables, Noncurrent	3.1	3.1
Other current liabilities:
Nontrade Receivables, Noncurrent	$ 3.1	$ 3.1