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

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

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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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.

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

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The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Debt - Senior Notes (Details) - USD ($)				12 Months Ended
Debt - Senior Notes (Details) - USD ($)	Jun. 30, 2022	Jan. 14, 2021	Feb. 25, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019	Apr. 12, 2019	Aug. 31, 2017	Jul. 31, 2016
Debt Instrument [Line Items]
Payment for Debt Extinguishment or Debt Prepayment Cost				$ 26,000,000	$ 15,000,000	$ 0
Proceeds from borrowings				555,000,000	1,558,000,000	752,000,000
Loss on extinguishment of debt		$ (36,000,000)		36,000,000	19,000,000	0
Repayments of Debt				829,000,000	929,000,000	$ 734,000,000
2023				$ 61,000,000
2025 Notes
Debt Instrument [Line Items]
Repayments of Senior Debt		840,000,000
Redemption Premium		26,000,000
Senior Notes \| Senior Unsecured Notes Due 2031
Debt Instrument [Line Items]
Interest rate of debt				3.625%
Aggregate principal amount				$ 535,000,000	0
Proceeds from borrowings		$ 528,000,000
Senior Notes \| 2025 Notes
Debt Instrument [Line Items]
Interest rate of debt								4.375%
Aggregate principal amount								$ 800,000,000
Senior Notes \| Senior Unsecured Notes Due 2030 [Domain]
Debt Instrument [Line Items]
Interest rate of debt				4.25%
Aggregate principal amount				$ 600,000,000	$ 600,000,000
Proceeds from borrowings			$ 592,000,000
Senior Notes \| Senior Unsecured Notes Due 2024 [Member]
Debt Instrument [Line Items]
Interest rate of debt									5.50%
Aggregate principal amount									$ 375,000,000
Payment for Debt Extinguishment or Debt Prepayment Cost				15,000,000
Repayments of Senior Debt			$ 394,000,000
Line of Credit \| 2019 Term Loans \| Secured Debt
Debt Instrument [Line Items]
Repayments of Debt				$ 100,000,000
Principal amount of line of credit							$ 575,000,000
Line of Credit \| 2019 Term Loans \| Secured Debt \| Scenario, Forecast
Debt Instrument [Line Items]
Repayments of Debt	$ 1,000,000