Income Taxes - Summary of Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Income Tax Disclosure [Abstract]
Income before income taxes	$ 152,440	$ 193,676	$ 1,102,214	$ 492,079
Provision for income taxes	$ 33,660	$ 52,348	$ 226,193	$ 105,875
Effective income tax rate	22.00%	27.00%	21.00%	22.00%

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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