Borrowings - Schedule of Debt Redemption (Details)	12 Months Ended
Sep. 30, 2022
6.750% Senior Notes (2025 Notes) \| Senior Notes
Debt Instrument, Redemption [Line Items]
Stated interest rate on debt instrument	6.75%
5.875% Senior Notes (2027 Notes) \| Senior Notes
Debt Instrument, Redemption [Line Items]
Stated interest rate on debt instrument	5.875%
7.250% Senior Notes (2029 Notes) \| Senior Notes
Debt Instrument, Redemption [Line Items]
Stated interest rate on debt instrument	7.25%
Senior Notes \| 6.750% Senior Notes (2025 Notes) \| Debt Instrument, Redemption, Period One
Debt Instrument, Redemption [Line Items]
Redemption price percentage	100.00%
Senior Notes \| 6.750% Senior Notes (2025 Notes) \| Debt Instrument, Redemption, Period Two
Debt Instrument, Redemption [Line Items]
Redemption price percentage	105.063%
Senior Notes \| 6.750% Senior Notes (2025 Notes) \| Debt Instrument, Redemption, Period Three
Debt Instrument, Redemption [Line Items]
Redemption price percentage	103.375%
Senior Notes \| 6.750% Senior Notes (2025 Notes) \| Debt Instrument, Redemption, Period Four
Debt Instrument, Redemption [Line Items]
Redemption price percentage	101.688%
Senior Notes \| 6.750% Senior Notes (2025 Notes) \| Debt Instrument, Redemption, Period Five
Debt Instrument, Redemption [Line Items]
Redemption price percentage	100.00%
Senior Notes \| 5.875% Senior Notes (2027 Notes) \| Debt Instrument, Redemption, Period One
Debt Instrument, Redemption [Line Items]
Redemption price percentage	100.00%
Senior Notes \| 5.875% Senior Notes (2027 Notes) \| Debt Instrument, Redemption, Period Two
Debt Instrument, Redemption [Line Items]
Redemption price percentage	102.938%
Senior Notes \| 5.875% Senior Notes (2027 Notes) \| Debt Instrument, Redemption, Period Three
Debt Instrument, Redemption [Line Items]
Redemption price percentage	101.958%
Senior Notes \| 5.875% Senior Notes (2027 Notes) \| Debt Instrument, Redemption, Period Four
Debt Instrument, Redemption [Line Items]
Redemption price percentage	100.979%
Senior Notes \| 5.875% Senior Notes (2027 Notes) \| Debt Instrument, Redemption, Period Five
Debt Instrument, Redemption [Line Items]
Redemption price percentage	100.00%
Senior Notes \| 7.250% Senior Notes (2029 Notes)
Debt Instrument, Redemption [Line Items]
Redemption price percentage	107.25%
Percentage of principal amount redeemed	35.00%
Percentage of principal amount outstanding after redemption	65.00%
Senior Notes \| 7.250% Senior Notes (2029 Notes) \| Debt Instrument, Redemption, Period One
Debt Instrument, Redemption [Line Items]
Redemption price percentage	100.00%
Senior Notes \| 7.250% Senior Notes (2029 Notes) \| Debt Instrument, Redemption, Period Two
Debt Instrument, Redemption [Line Items]
Redemption price percentage	103.625%
Senior Notes \| 7.250% Senior Notes (2029 Notes) \| Debt Instrument, Redemption, Period Three
Debt Instrument, Redemption [Line Items]
Redemption price percentage	102.417%
Senior Notes \| 7.250% Senior Notes (2029 Notes) \| Debt Instrument, Redemption, Period Four
Debt Instrument, Redemption [Line Items]
Redemption price percentage	101.208%
Senior Notes \| 7.250% Senior Notes (2029 Notes) \| Debt Instrument, Redemption, Period Five
Debt Instrument, Redemption [Line Items]
Redemption price percentage	100.00%

Debt Instrument, Redemption Price, Percentage of Principal Amount Outstanding After Redemption

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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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.

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI https://asc.fasb.org/extlink&oid=123599511&loc=d3e64711-112823

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- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

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