XML 87 R65.htm IDEA: XBRL DOCUMENT
v3.19.2

Debt - Financing Activity and Covenants - Additional Information (Details) | 9 Months Ended
--- | ---
Jun. 30, 2019 USD ($)
Debt Instrument [Line Items] |
Line of Credit Facility, Remaining Borrowing Capacity | $ 673,000,000
Covenant restrictions [Abstract] |
Maximum consolidated leverage ratio | 4.5
Calculated leverage ratio | 3.6
Minimum required consolidated interest coverage ratio | 3.0
Calculated consolidated interest coverage ratio | 5.6
Revolving Credit Facility [Member] |
Debt Instrument [Line Items] |
Line of Credit Facility, Remaining Borrowing Capacity | $ 661,000,000
Line of credit facility outstanding principal amount | 90,000,000
Letters of Credit Outstanding, Amount | 49,000,000
Accounts Receivable Securitization [Member] |
Debt Instrument [Line Items] |
Line of Credit Facility, Remaining Borrowing Capacity | $ 12,000,000

X
- Definition The calculated consolidated interest coverage ratio under the debt instruments. + References No definition available. + Details
Name: | ash_CalculatedConsolidatedInterestCoverageRatio
Namespace Prefix: | ash_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition The calculated consolidated leverage ratio permitted under the debt instruments. + References No definition available. + Details
Name: | ash_CalculatedConsolidatedLeverageRatio
Namespace Prefix: | ash_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition States whether the entity was in compliance with the debt covenants throughout the reporting period, and describes facts and circumstances of any compliance failure. + References No definition available. + Details
Name: | ash_CovenantRestrictionsAbstract
Namespace Prefix: | ash_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum consolidated leverage ratio permitted under the debt instruments. + References No definition available. + Details
Name: | ash_MaximumConsolidatedLeverageRatio
Namespace Prefix: | ash_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition The minimum required consolidated interest coverage ratio under the debt instruments. + References No definition available. + Details
Name: | ash_MinimumConsolidatedInterestCoverageRatio
Namespace Prefix: | ash_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- 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
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum amount borrowed under the credit facility at any time during the period. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |