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Goodwill and Intangible Assets (Tables) | 6 Months Ended
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Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Components of Company's Goodwill and Intangible Assets | Goodwill and intangible assets comprise the following:
|  | March 31, 2020 |  | September 30, 2019 |  | March 31, 2019
Goodwill |  | $ | 3,465.5 |  |  | $ | 3,456.4 |  |  | $ | 3,147.8 |
Intangible assets: |  |  |  |  |  |
Customer relationships |  | $ | 1,040.4 |  |  | $ | 1,038.4 |  |  | $ | 782.1 |
Trademarks and tradenames |  | 11.8 |  |  | 16.2 |  |  | 16.5 |
Noncompete agreements and other |  | 68.1 |  |  | 46.4 |  |  | 55.2 |
Accumulated amortization |  | (478.7 | ) |  | (441.8 | ) |  | (416.3 | )
Intangible assets, net (definite-lived) |  | 641.6 |  |  | 659.2 |  |  | 437.5 |
Trademarks and tradenames (indefinite-lived) |  | 46.2 |  |  | 49.4 |  |  | 50.8 |
Total intangible assets, net |  | $ | 687.8 |  |  | $ | 708.6 |  |  | $ | 488.3 |

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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