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Segment Information - Revenues by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Schedule of Revenues by Geographic Region [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 731,123	$ 681,354	$ 1,497,612	$ 1,373,951
United States
Schedule of Revenues by Geographic Region [Line Items]
Revenue from contract with customer, excluding assessed tax	373,789	363,847	781,177	713,922
Other Americas [Member]
Schedule of Revenues by Geographic Region [Line Items]
Revenue from contract with customer, excluding assessed tax	22,337	21,718	46,922	48,033
Total Americas
Schedule of Revenues by Geographic Region [Line Items]
Revenue from contract with customer, excluding assessed tax	396,126	385,565	828,099	761,955
EMEA
Schedule of Revenues by Geographic Region [Line Items]
Revenue from contract with customer, excluding assessed tax	213,971	178,386	418,358	371,749
APAC
Schedule of Revenues by Geographic Region [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 121,026	$ 117,403	$ 251,155	$ 240,247

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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