v3.26.1
Income Taxes - Narrative (Details)
$ / shares in Units, $ in Millions, RM in Billions
1 Months Ended 12 Months Ended
Mar. 31, 2025
USD ($)
Mar. 31, 2025
MYR (RM)
Mar. 31, 2026
USD ($)
$ / shares
Mar. 31, 2025
USD ($)
$ / shares
Mar. 31, 2024
USD ($)
$ / shares
Mar. 31, 2023
USD ($)
Mar. 31, 2018
USD ($)
Operating Loss Carryforwards [Line Items]              
Income tax holiday, aggregate dollar amount     $ 5.1 $ 12.0 $ 22.5    
Impact of the tax holidays, each basic and diluted net income per share (in dollars per share) | $ / shares     $ 0.01 $ 0.02 $ 0.04    
Capital loss carryforward $ 9.8   $ 10.1 $ 9.8      
Disallowed expense carryforwards 242.8   377.5 242.8      
TCJA transition tax for accumulated foreign earnings, percentage of liability payable each year for fiscal 2019 through fiscal 2023             8.00%
TCJA expected transition tax on accumulated unrepatriated foreign earnings             $ 293.6
TCJA transition tax for accumulated foreign earnings, percentage of liability payable in fiscal 2024             15.00%
TCJA transition tax for accumulated foreign earnings, percentage of liability payable in fiscal 2025             20.00%
TCJA transition tax for accumulated foreign earnings, percentage of liability payable in fiscal 2026             25.00%
Unrecognized tax benefits, income tax penalties accrued 135.8   120.1 135.8      
Unrecognized tax benefits, income tax penalties and interest expense     15.7 31.2      
Unrecognized tax benefits 821.2   679.8 821.2 $ 792.4 $ 848.0  
Unrecognized tax benefits that would impact effective tax rate 706.4   600.1 $ 706.4      
Tax benefit due to settlement reached with tax authorities     $ 24.4        
Basic net income (loss) per common share (in dollars per share) | $ / shares     $ 0.22 $ (0.01) $ 3.52    
Diluted net income (loss) per common share (in dollars per share) | $ / shares     0.22 $ (0.01) $ 3.48    
Unrecognized tax position remeasurement              
Operating Loss Carryforwards [Line Items]              
Basic net income (loss) per common share (in dollars per share) | $ / shares     0.05        
Diluted net income (loss) per common share (in dollars per share) | $ / shares     $ 0.04        
Foreign Tax Authority and Federal and State Jurisdiction              
Operating Loss Carryforwards [Line Items]              
Operating loss carryforwards     $ 62.4        
Tax credit carryforward, amount     260.9        
Disallowed expense carryforwards     $ 377.5        
Foreign Tax Jurisdiction | Malaysian IRB              
Operating Loss Carryforwards [Line Items]              
Income tax, estimate of possible loss $ 480.2 RM 1.9