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Identifiable Intangible Assets (Tables) | 12 Months Ended
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Sep. 30, 2020
Goodwill [Line Items] |
Schedule of Goodwill [Table Text Block] | Changes in the carrying amount of goodwill were as follows:
| September 30,
| 2020 |  | 2019
| (in millions)
Balance at beginning of year | $ | 95.7 |  |  | $ | 12.1 |
Acquisition of Krausz | 0.3 |  |  | 80.1 |
Change in foreign currency exchange rates | 3.8 |  |  | 3.5 |
Balance at end of year | $ | 99.8 |  |  | $ | 95.7 |
Schedule of Intangible Assets and Goodwill [Table Text Block] | Intangible assets are presented below.
| September 30,
| 2020 |  | 2019
| (in millions)
Capitalized internal-use software: |  |  |
Cost | $ | 31.5 |  |  | $ | 30.2 |
Accumulated amortization | (20.8) |  |  | (17.5) |
Net book value | 10.7 |  |  | 12.7 |
Business combination-related: |  |  |
Cost: |  |  |
Finite-lived intangible assets: |  |  |
Technology | 118.5 |  |  | 116.6 |
Customer relationships and other | 370.2 |  |  | 370.0 |
Indefinite-lived intangible assets: |  |  |
Trade names and trademarks | 271.6 |  |  | 271.4 |
| 760.4 |  |  | 758.0 |
Accumulated amortization: |  |  |
Technology | (81.0) |  |  | (76.4) |
Customer relationships and other | (281.2) |  |  | (260.6) |
| (362.2) |  |  | (337.0) |
Net book value | 398.2 |  |  | 421.0 |
Total intangible assets net book value | $ | 408.9 |  |  | $ | 433.7 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + 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=121556970&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13854-109267 + Details
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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=121556970&loc=d3e13816-109267 + Details
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