Debt - Short-term Debt (Details) - ABL facility - USD ($)	12 Months Ended
Sep. 30, 2023	Sep. 30, 2022
Debt Instruments
Outstanding borrowing	$ 500,000,000.0
Outstanding borrowing	$ 0	$ 68,500,000
Debt instrument term	5 years
Debt instrument, maturity date	May 11, 2026
Debt instrument maturity terms	a maturity date of the earlier of (i) May 11, 2026, (ii) the date which is ninety-one (91) days prior to the maturity date of any indebtedness arising under the TLB 2030 and any refinancing thereof, and (iii) the date which is ninety-one (91) days prior to the maturity date of any indebtedness arising under the 2025 Senior Notes and any refinancing thereof.
Line of credit facility, commitment fee percentage	0.20%
Revolving credit facility	$ 482,600,000
Prime \| Minimum
Debt Instruments
Percentage points added to the reference rate	0.25%
Prime \| Maximum
Debt Instruments
Percentage points added to the reference rate	0.50%
SOFR \| Minimum
Debt Instruments
Percentage points added to the reference rate	1.25%
SOFR \| Maximum
Debt Instruments
Percentage points added to the reference rate	1.50%

Debt instrument maturity terms.

No definition available.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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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.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

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+ Details

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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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

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+ Details

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- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ 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

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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

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