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

Other defined benefit plan net periodic benefit income expense.

No definition available.

Name:	ash_OtherDefinedBenefitPlanNetPeriodicBenefitIncomeExpense
Namespace Prefix:	ash_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of contribution received by defined benefit plan from employer which increases plan assets.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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.

No definition available.

Name:	us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of contribution expected to be received by defined benefit plan from employer in remainder of current fiscal year. Excludes contribution previously paid by employer in current fiscal year.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The number of positions eliminated during the period as a result of restructuring activities.

No definition available.