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Business Combination (Tables) | 12 Months Ended
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Sep. 30, 2020 | Sep. 30, 2018
Business Combinations [Abstract] |  |
Schedule of Business Acquisitions, by Acquisition [Table Text Block] | The following is a summary of the estimated fair values of the net assets acquired (in millions):
Assets, net of cash: |
Receivables | $ | 6.9 |
Inventories | 17.0 |
Other current assets | 0.2 |
Property, plant and equipment | 8.1 |
Other non-current assets | 1.7 |
Identified intangible assets: |
Patents | 32.1 |
Customer relationships | 8.7 |
Trade names | 4.6 |
Favorable leasehold interests | 2.3 |
Goodwill | 80.4 |
Liabilities: |
Accounts payable | (5.5) |
Other current liabilities | (2.9) |
Deferred income taxes | (11.2) |
Other non-current liabilities | (1.7) |
Consideration paid | 140.7 |
Repayment of Krausz debt | (13.2) |
Consideration paid included in net cash used in investing activities | $ | 127.5 |
Disposal Group, Details of Gain on Sale |  | Divestiture of Burlington plant On December 4, 2017, we sold an idle property in Burlington, New Jersey that had previously been a plant in our former U.S. Pipe segment and recorded a gain of $9.0 million in our Corporate segment. We received $7.4 million, recorded net current assets of $0.8 million and conveyed plant, property and equipment with a net carrying value of $0.4 million, and the buyer assumed related environmental liabilities with a carrying value of $1.2 million.

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- Definition Tabular disclosure of a material business combination completed during the period, including background, timing, and recognized assets and liabilities. This table does not include leveraged buyouts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1486-128463 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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