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Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in Carrying Amount of Goodwill | The changes in the carrying amount of goodwill in each of the Company’s reportable segments for the six month period ended March 31, 2018 were as follows (in millions):
|  |  | Business Acquisitions |  | Business Divestitures |  | Currency Translation and Other |  |
| September 30, |  |  |  |  | March 31,
| 2017 |  |  |  |  | 2018
Building Technologies & Solutions |  |  |  |  |  |  |  |  |
Building Solutions North America | $ | 9,637 |  |  | $ | — |  |  | $ | — |  |  | $ | (22 | ) |  | $ | 9,615 |
Building Solutions EMEA/LA | 2,012 |  |  | — |  |  | — |  |  | 77 |  |  | 2,089 |
Building Solutions Asia Pacific | 1,255 |  |  | — |  |  | — |  |  | 54 |  |  | 1,309 |
Global Products | 5,687 |  |  | 8 |  |  | (20 | ) |  | 2 |  |  | 5,677 |
Power Solutions | 1,097 |  |  | — |  |  | — |  |  | 19 |  |  | 1,116 |
Total | $ | 19,688 |  |  | $ | 8 |  |  | $ | (20 | ) |  | $ | 130 |  |  | $ | 19,806 |
Other Intangible Assets | The Company’s other intangible assets, primarily from business acquisitions valued based on independent appraisals, consisted of (in millions):
| March 31, 2018 |  | September 30, 2017
| Gross Carrying Amount |  | Accumulated Amortization |  | Net |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net
Amortized intangible assets |  |  |  |  |  |  |  |  |  |  |
Technology | $ | 1,344 |  |  | $ | (205 | ) |  | $ | 1,139 |  |  | $ | 1,328 |  |  | $ | (137 | ) |  | $ | 1,191 |
Customer relationships | 3,163 |  |  | (561 | ) |  | 2,602 |  |  | 3,168 |  |  | (486 | ) |  | 2,682 |
Miscellaneous | 443 |  |  | (176 | ) |  | 267 |  |  | 389 |  |  | (147 | ) |  | 242 |
Total amortized intangible assets | 4,950 |  |  | (942 | ) |  | 4,008 |  |  | 4,885 |  |  | (770 | ) |  | 4,115 |
Unamortized intangible assets |  |  |  |  |  |  |  |  |  |  |
Trademarks/trade names | 2,494 |  |  | — |  |  | 2,494 |  |  | 2,483 |  |  | — |  |  | 2,483 |
Miscellaneous | 123 |  |  | — |  |  | 123 |  |  | 143 |  |  | — |  |  | 143 |
| 2,617 |  |  | — |  |  | 2,617 |  |  | 2,626 |  |  | — |  |  | 2,626 |
Total intangible assets | $ | 7,567 |  |  | $ | (942 | ) |  | $ | 6,625 |  |  | $ | 7,511 |  |  | $ | (770 | ) |  | $ | 6,741 |

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- Definition Tabular disclosure of amortizable and unamortizable intangible assets other than goodwill, in total and by major class, including the gross carrying amount and accumulated amortization. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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