Supplemental Balance Sheet Information (Schedule Of Selected Supplemental Balance Sheet Information) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013
Inventories:
Purchased components and raw material	$ 75.2	$ 75.4
Work in process	40.1	38.6
Finished goods	99.0	94.5
Inventories, net	214.3	208.5
Other current assets:
Maintenance and repair tooling	22.7	22.5
Prepaid income taxes	14.2	14.9
U.S. Pipe-related workers' compensation and other reimbursements	2.5	2.2
Other	7.1	6.5
Other current assets	46.5	46.1
Property, plant and equipment:
Land	10.6	10.6
Buildings	76.2	75.5
Machinery and equipment	310.4	305.7
Construction in progress	20.2	19.6
Property, plant and equipment, gross	417.4	411.4
Accumulated depreciation	(275.5)	(269.5)
Property, plant and equipment net	141.9	141.9
Other current liabilities:
Compensation and benefits	25.6	37.3
Customer rebates	17.7	15.5
Interest	8.2	12.0
Taxes other than income taxes	4.3	5.0
Warranty	2.6	2.8
Income taxes	1.3	1.3
Environmental	0.2	0.2
Other	7.0	6.5
Other current liabilities	$ 66.9	$ 80.6