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U.S. and Europe Retrospective Responsibility Plans - Additional Details (Details) € in Millions	9 Months Ended
	Jun. 30, 2023 EUR (€)
Retrospective Responsibility Plans [Abstract]
VE covered loss, maximum amount of loss to allow adjustment of conversion rate during six-month period	€ 20

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- Definition

Retrospective Responsibility Plans [Abstract]

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No definition available.

+ Details

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- Definition

VE Covered Loss, Protection from the Plan Relating to Liabilities where the Claim Relates to Inter-regional Multilateral Interchange Fee Rates

+ References

No definition available.

+ Details

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