Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Income Tax Disclosure [Abstract]
Income before provision for income taxes	$ 1,994,967	$ 448,162	$ 2,526,587	$ 763,927
Provision for income taxes	$ 452,522	$ 89,570	$ 558,465	$ 150,732
Effective tax rate	22.70%	20.00%	22.10%	19.70%