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Derivative Financial Instruments and Fair Value Measurements - Fair Value Measurements (Details) - USD ($) $ in Millions	Dec. 31, 2022	Sep. 30, 2022
Interest Rate Swap and Interest Rate Cap | Other current assets
Derivative financial instruments
Fair values of the interest rate swap and cap agreements	$ 14.6
Interest Rate Swap and Interest Rate Cap | Other non-current assets
Derivative financial instruments
Fair values of the interest rate swap and cap agreements	$ 34.1
Interest Rate Swap | Other non-current assets
Derivative financial instruments
Fair values of the interest rate swap and cap agreements		$ 9.4
Interest Rate Swap | Other long-term liabilities
Derivative financial instruments
Fair values of the interest rate swap and cap agreements		$ 41.8

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- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126966630&loc=d3e41228-113958

+ 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.

+ References

No definition available.

+ Details

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