Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022
Income Tax Disclosure [Abstract]
Effective income tax rate reconciliation, percent	(1.70%)	8.40%	(1.30%)	4.40%
Discrete tax benefit		$ 9.7		$ 9.7