Debt - Schedule of Short-Term Borrowings and Long Term Debt (Details) - USD ($)	Dec. 31, 2022	Sep. 30, 2022
Debt Instrument [Line Items]
Debt issuance costs and discounts	$ (12,000,000.0)	$ (12,400,000)
Total debt	1,880,600,000	1,687,600,000
Current portion of long-term debt	224,500,000	162,500,000
Long-term debt	1,656,100,000	1,525,100,000
Line of Credit \| Revolver (a)
Debt Instrument [Line Items]
Long-term debt	145,000,000.0	0
2031 Notes \| Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount	535,000,000.0	535,000,000.0
2030 Notes \| Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount	600,000,000.0	600,000,000.0
Term Loan \| Line of Credit
Debt Instrument [Line Items]
Debt gross	445,600,000	460,000,000.0
Term Loan \| Line of Credit \| Revolver (a)
Debt Instrument [Line Items]
Debt gross	475,000,000
Total borrowing capacity remaining	324,600,000
Letters of credit outstanding	5,400,000
Trade Receivables Facility (b) \| Line of Credit \| Secured Debt
Debt Instrument [Line Items]
Long-term debt	167,000,000.0	$ 105,000,000.0
Total borrowing capacity remaining	8,000,000
Trade Receivables Facility (b) \| Line of Credit \| Secured Debt \| Financing Subsidiary
Debt Instrument [Line Items]
Accounts receivable pledged as collateral	$ 357,600,000

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount of assets pledged to secure a debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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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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Amount of unamortized debt discount (premium) and debt issuance costs.

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- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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