Aggregate claim deductible related to environmental remediation indemnification obligations.

No definition available.

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Namespace Prefix:	nexeo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Individual claim threshold related to environmental remediation indemnification obligations.

+ References

No definition available.

+ Details

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Namespace Prefix:	nexeo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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.

+ Details

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- Details

Name:	dei_LegalEntityAxis=nexeo_AshlandIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_EnvironmentalRemediationContingencyAxis=nexeo_OtherRetainedRemediationLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments, Contingencies and Litigation - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Mar. 31, 2011	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Environmental Remediation
Rent expense		$ 6.0	$ 6.7	$ 12.5	$ 13.1
Ashland \| Other Retained Remediation Liabilities
Environmental Remediation
Remediation indemnification obligation resulting from breach of any representation, warranty or covenant individual claim threshold	$ 0.2
Remediation indemnification obligation resulting from breach of any representation, warranty or covenant aggregate claim deductible	$ 5.0