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Derivative Instruments and Hedging Activities - Additional Information (Detail) - Interest Rate Swap - Cash flow hedges - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2024	Mar. 31, 2024
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss) Upon Termination Of Derivative Instrument, After Reclassification And Tax, Parent	$ 67
Derivative Notional Amount Terminated		$ 500

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Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss) Upon Termination Of Derivative Instrument, After Reclassification And Tax, Parent

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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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