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Significant Accounting Policies and Practices and Recent Accounting Pronouncements Significant Accounting Policies and Practices and Recent Accounting Pronouncements (Tables) | 6 Months Ended
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Mar. 31, 2018
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment [Table Text Block] | Property, plant and equipment, net in the accompanying Condensed Consolidated Balance Sheets consist of the following:
| March 31, 2018 |  | September 30, 2017
Land, buildings and improvements | $ | 154.8 |  |  | $ | 146.6 |
Machinery, equipment and other | 401.4 |  |  | 380.8 |
Capitalized leases | 212.0 |  |  | 210.3 |
Construction in progress | 43.8 |  |  | 40.4 |
Properties, plant and equipment at cost | 812.0 |  |  | 778.1 |
Less: Accumulated depreciation | 307.5 |  |  | 274.2 |
Total properties, plant and equipment, net | $ | 504.5 |  |  | $ | 503.9 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] | The carrying value and accumulated amortization for intangible assets subject to amortization as of March 31, 2018 and September 30, 2017 are as follows:
| March 31, 2018 |  | September 30, 2017
| Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net
Customer relationships | $ | 675.1 |  |  | $ | (243.1 | ) |  | $ | 432.0 |  |  | $ | 671.7 |  |  | $ | (222.3 | ) |  | $ | 449.4 |
Technology assets | 194.7 |  |  | (68.7 | ) |  | 126.0 |  |  | 194.6 |  |  | (59.7 | ) |  | 134.9 |
Tradenames | 5.5 |  |  | (3.0 | ) |  | 2.5 |  |  | 18.5 |  |  | (15.1 | ) |  | 3.4 |
| $ | 875.3 |  |  | $ | (314.8 | ) |  | $ | 560.5 |  |  | $ | 884.8 |  |  | $ | (297.1 | ) |  | $ | 587.7 |
The range and weighted average useful lives for definite-lived intangible assets are as follows:
Asset Type |  | Range |  | Weighted Average
Customer relationships |  | 2 to 20 years |  | 17.9 years
Technology assets |  | 6 to 18 years |  | 11.4 years
Tradenames |  | 5 to 13 years |  | 6.2 years

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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