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- Definition

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

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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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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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DEBT (Details) € in Millions, $ in Billions			6 Months Ended
DEBT (Details) € in Millions, $ in Billions	Feb. 10, 2026 USD ($)	Feb. 11, 2025 USD ($)	Mar. 31, 2026 USD ($)	Sep. 30, 2025 EUR (€)	Mar. 31, 2025 EUR (€)	Sep. 30, 2019 EUR (€)
Senior Notes
Debt Instrument, Redemption [Line Items]
Debt, face amount						€ 1,500
Revolving Backup Credit Facility \| Line of Credit \| Revolving Credit Facility
Debt Instrument, Redemption [Line Items]
Line of credit facility, maximum borrowing capacity \| $	$ 2.0	$ 3.0
Debt instrument, term	364 days	364 days
Five Year Revolving Backup Credit Facility \| Line of Credit
Debt Instrument, Redemption [Line Items]
Line of credit facility, maximum borrowing capacity \| $			$ 3.5
Debt instrument, term			5 years
Due March 2031 \| Senior Notes
Debt Instrument, Redemption [Line Items]
Debt, face amount				€ 500	€ 500
Notes interest rate, percentage				3.00%	3.00%
Due March 2035 \| Senior Notes
Debt Instrument, Redemption [Line Items]
Debt, face amount					€ 500
Notes interest rate, percentage					5.00%
Due March 2037 \| Senior Notes
Debt Instrument, Redemption [Line Items]
Debt, face amount				€ 500	€ 500
Notes interest rate, percentage				3.50%	3.50%