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Balance Sheet Details - Other Current Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Sep. 30, 2025
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Balance Sheet Details [Abstract] |  |
Unbilled receivables | $ 583,051 | $ 498,288
Prepaid expenses | 118,734 | 86,346
Capitalized contract acquisition costs | 41,515 | 37,023
Other | 42,323 | 61,109
Other Assets, Current | $ 785,623 | $ 682,766

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