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Balance Sheet Details - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Balance Sheet Details [Abstract]
Goodwill, Beginning Balance	$ 2,288,678	$ 2,259,282
Goodwill, Acquired During Period	23,684	29,396
Goodwill, Ending Balance	$ 2,312,362	$ 2,288,678

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Balance Sheet Details [Abstract]

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Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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