Debt - Short-term Borrowings Associated with Operations in China (Details) - USD ($) $ in Millions	Jun. 30, 2016	Sep. 30, 2015
Successor \| Nexeo Plaschem
Debt Instrument [Line Items]
Facility Limit	$ 51.4
Outstanding Borrowings Balance	41.0
Remaining Availability	1.9
Successor \| Nexeo Plaschem \| Bank of America - China
Debt Instrument [Line Items]
Facility Limit	28.8
Outstanding Borrowings Balance	$ 27.2
Weighted Average Interest Rate on Borrowings	3.70%
Remaining Availability	$ 1.6
Successor \| Nexeo Plaschem \| Bank of Communications - China
Debt Instrument [Line Items]
Facility Limit	22.6
Outstanding Borrowings Balance	$ 13.8
Weighted Average Interest Rate on Borrowings	5.30%
Remaining Availability	$ 0.3
Successor \| Outstanding LOC and Bankers’ Acceptance Bills \| Nexeo Plaschem
Debt Instrument [Line Items]
Outstanding LOC and Bankers’ Acceptance Bills	8.5
Successor \| Outstanding LOC and Bankers’ Acceptance Bills \| Nexeo Plaschem \| Bank of America - China
Debt Instrument [Line Items]
Outstanding LOC and Bankers’ Acceptance Bills	0.0
Successor \| Outstanding LOC and Bankers’ Acceptance Bills \| Nexeo Plaschem \| Bank of Communications - China
Debt Instrument [Line Items]
Outstanding LOC and Bankers’ Acceptance Bills	$ 8.5
Predecessor \| Nexeo Plaschem
Debt Instrument [Line Items]
Facility Limit		$ 47.4
Outstanding Borrowings Balance		34.9
Remaining Availability		5.4
Predecessor \| Nexeo Plaschem \| Bank of America - China
Debt Instrument [Line Items]
Facility Limit		23.8
Outstanding Borrowings Balance		$ 23.0
Weighted Average Interest Rate on Borrowings		3.50%
Remaining Availability		$ 0.8
Predecessor \| Nexeo Plaschem \| Bank of Communications - China
Debt Instrument [Line Items]
Facility Limit		23.6
Outstanding Borrowings Balance		$ 11.9
Weighted Average Interest Rate on Borrowings		6.10%
Remaining Availability		$ 4.6
Predecessor \| Outstanding LOC and Bankers’ Acceptance Bills \| Nexeo Plaschem
Debt Instrument [Line Items]
Outstanding LOC and Bankers’ Acceptance Bills		7.1
Predecessor \| Outstanding LOC and Bankers’ Acceptance Bills \| Nexeo Plaschem \| Bank of America - China
Debt Instrument [Line Items]
Outstanding LOC and Bankers’ Acceptance Bills		0.0
Predecessor \| Outstanding LOC and Bankers’ Acceptance Bills \| Nexeo Plaschem \| Bank of Communications - China
Debt Instrument [Line Items]
Outstanding LOC and Bankers’ Acceptance Bills		7.1
Asset Based Loan [Member] \| Nexeo Plaschem \| Bank of America - China
Debt Instrument [Line Items]
Line of credit facility collateral coverage	110.00%
Asset Based Loan [Member] \| Nexeo Plaschem \| Bank of Communications - China
Debt Instrument [Line Items]
Line of credit facility collateral coverage	100.00%
Asset Based Loan [Member] \| Predecessor
Debt Instrument [Line Items]
Remaining Availability		$ 321.4

The percentage of the line of credit borrowing capacity which is secured by a standby letter of credit.

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

+ Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Balance Type:	credit
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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.13)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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 210.5-02.19(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.(a),16(a)(1))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 13
-Subparagraph 2, 3
-Article 9

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Balance Type:	credit
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- Definition

Weighted average interest rate of short-term debt outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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