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Segment Information | 9 Months Ended
--- | ---
Jun. 30, 2017
Segment Reporting, Measurement Disclosures [Abstract] |
Segment Reporting Disclosure [Text Block] | Note 11. Segment Information Summarized financial information for our segments is presented below.
| Three months ended |  | Nine months ended
| June 30, |  | June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
| (in millions)
Net sales, excluding intercompany: |  |  |  |  |  |  |
Mueller Co. | $ | 207.6 |  |  | $ | 198.7 |  |  | $ | 535.5 |  |  | $ | 525.6 |
Mueller Technologies | 24.6 |  |  | 26.0 |  |  | 63.6 |  |  | 59.4 |
| $ | 232.2 |  |  | $ | 224.7 |  |  | $ | 599.1 |  |  | $ | 585.0 |
Operating income (loss): |  |  |  |  |  |  |
Mueller Co. | $ | 52.9 |  |  | $ | 51.7 |  |  | $ | 113.3 |  |  | $ | 110.4 |
Mueller Technologies | (1.6 | ) |  | (1.5 | ) |  | (17.5 | ) |  | (10.2 | )
Corporate | (8.7 | ) |  | (27.6 | ) |  | (28.4 | ) |  | (45.1 | )
| $ | 42.6 |  |  | $ | 22.6 |  |  | $ | 67.4 |  |  | $ | 55.1 |
Depreciation and amortization: |  |  |  |  |  |  |
Mueller Co. | $ | 8.9 |  |  | $ | 8.5 |  |  | $ | 27.0 |  |  | $ | 25.5 |
Mueller Technologies | 1.2 |  |  | 1.2 |  |  | 3.8 |  |  | 3.5 |
Corporate | 0.1 |  |  | 0.1 |  |  | 0.3 |  |  | 0.3 |
| $ | 10.2 |  |  | $ | 9.8 |  |  | $ | 31.1 |  |  | $ | 29.3 |
Pension settlement and other charges: |  |  |  |  |  |  |
Mueller Co. | $ | 0.4 |  |  | $ | 2.4 |  |  | $ | 2.1 |  |  | $ | 3.0 |
Mueller Technologies | — |  |  | — |  |  | 0.1 |  |  | 0.5 |
Corporate | 0.8 |  |  | 18.8 |  |  | 2.8 |  |  | 19.3 |
| $ | 1.2 |  |  | $ | 21.2 |  |  | $ | 5.0 |  |  | $ | 22.8 |
Capital expenditures: |  |  |  |  |  |  |
Mueller Co. | $ | 6.1 |  |  | $ | 3.6 |  |  | $ | 13.8 |  |  | $ | 12.4 |
Mueller Technologies | 1.3 |  |  | 1.5 |  |  | 7.6 |  |  | 4.5 |
Corporate | 0.1 |  |  | — |  |  | 0.2 |  |  | 0.1 |
| $ | 7.5 |  |  | $ | 5.1 |  |  | $ | 21.6 |  |  | $ | 17.0 |
Mueller Technologies' operating loss for the nine months ended June 30, 2017 includes a warranty expense of $9.8 million, as described in Note 13.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8981-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8971-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8595-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8380-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8984-108599 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9031-108599 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9054-108599 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8538-108599 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8864-108599 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8924-108599 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599 + Details
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