Segment Information - Product Revenues by Systems and Software (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Product Information [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 731,123	$ 681,354	$ 1,497,612	$ 1,373,951
Product
Product Information [Line Items]
Revenue from contract with customer, excluding assessed tax	337,196	300,162	705,693	606,021
Systems \| Product
Product Information [Line Items]
Revenue from contract with customer, excluding assessed tax	179,405	141,654	339,113	277,028
Software \| Product
Product Information [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 157,791	$ 158,508	$ 366,580	$ 328,993

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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+ Details

F5, INC. 10-Q