Acquisitions - Schedule of Consolidated Pro Forma Financial Information (Details) - Nexeo Solutions Inc. - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Business Acquisition [Line Items]
Sales and operating revenues	$ 942.6	$ 879.4	$ 2,690.4	$ 2,598.5
Operating income	25.3	15.6	39.6	32.9
Net income from continuing operations	11.2	5.0	3.8	1.5
Net income	$ 11.2	$ 5.0	$ 3.8	$ 1.5
Basic and diluted net income (loss) per share (USD per share)	$ 0.15	$ 0.07	$ 0.05	$ 0.02
Pro forma weighted average number of common shares outstanding
Basic (in shares)	76,743,853	76,746,168	76,745,396	76,746,168
Diluted (in shares)	76,828,868	76,810,686	76,830,296	76,800,051

Business Acquisition, Pro Forma Earnings Per Share, Basic and Diluted

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Business Acquisition, Pro Forma Operating Income (Loss)

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Amount after tax of pro forma income from continuing operations as if the business combination had been completed at the beginning of a period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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The weighted average number of shares or units and dilutive common stock or unit equivalents outstanding in the calculation of proforma diluted earnings per share (earnings per unit), which is commonly presented in initial public offerings based on the terms of the offering.

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The weighted average number of shares (units) outstanding in the calculation of pro forma basic earnings per share (earnings per unit), which is commonly presented in initial public offerings based on the terms of the offering.

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