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Acquisitions Goodwill and intangible assets (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Sep. 30, 2018
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Goodwill and intangible assets [Abstract] |  |
Goodwill and intangible assets recorded related to acquisitions | $ 7.6 | $ 24.0

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- Definition Goodwill and intangible assets [Abstract] + References No definition available. + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=116868840&loc=d3e2207-128464 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
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