Income Taxes (Tables)

6 Months Ended

Mar. 31, 2026

Income Tax Disclosure [Abstract]

Summary of Income Taxes

(in thousands)	Three months ended						Six months ended
	March 31, 2026			March 31, 2025			March 31, 2026			March 31, 2025
Income before income taxes	$	746,799		$	205,249		$	949,774		$	298,403
Provision for income taxes	$	156,076		$	42,605		$	192,533		$	53,527
Effective income tax rate		21	%		21	%		20	%		18	%