Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jul. 09, 2020	Apr. 24, 2017
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance	$ (255.7)	$ (63.8)
Deferred tax liability associated with the undistributed earnings of foreign subsidiaries	4.7
Unrecognized tax benefits (including penalties and interest)	32.0	60.9
Unrecognized tax benefits which would impact the effective tax rate if recognized	6.9	1.6
Liability pertaining to uncertain tax positions	4.2	0.9
U.S.
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance	(204.9)
NOLs	662.4	645.8
Annual limitation for NOLs			$ 29.0	$ 0.1
United States and India
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance	(58.5)
Romania and U.K.
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance	7.7
Romania
Operating Loss Carryforwards [Line Items]
NOLs	697.3	658.2
Romania | Disallowed Income Tax Deductions
Operating Loss Carryforwards [Line Items]
Proposed reduction in NOLs	66.7
Proposed reduction in NOL appealed	64.3
Estimated exposure	25.4
U.K.
Operating Loss Carryforwards [Line Items]
NOLs	95.2	101.7
Japan
Operating Loss Carryforwards [Line Items]
NOLs	0.0	1.8
India
Operating Loss Carryforwards [Line Items]
Corporate income tax assessment	1.9
State
Operating Loss Carryforwards [Line Items]
NOLs	$ 941.2	$ 834.6