Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 590,723	$ 162,644	$ 757,241	$ 244,876
Other comprehensive income (loss), net of tax:
Hedge gain (loss) arising during the period, net of tax of $(2.2) million and $4.9 million in the second quarter of 2026 and 2025, respectively, and $(2.0) million and $(3.3) million in the first six months of 2026 and 2025, respectively	6,745	(15,014)	6,156	10,226
Foreign currency translation adjustment, net of tax of $0 for each period	(18,414)	36,202	(17,885)	(27,795)
Change in pension benefit, net of tax of $(0.1) million and $0.0 million in the second quarter of 2026 and 2025, respectively, and $(0.1) million and $(0.1) million in the first six months of 2026 and 2025, respectively	256	(313)	332	531
Other comprehensive income (loss)	(11,413)	20,875	(11,397)	(17,038)
Comprehensive income	$ 579,310	$ 183,519	$ 745,844	$ 227,838