v3.26.1
Net Sales (Details) - USD ($)
$ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Disaggregation of Revenue [Line Items]      
Total net sales $ 4,713.1 $ 4,401.6 $ 7,634.4
Semiconductor products      
Disaggregation of Revenue [Line Items]      
Total net sales 4,549.3 4,270.5 7,531.1
Deferred revenue 461.2 597.9  
Deferred revenue, to be recognized within next 12 months 179.2 213.4  
Deferred revenue, non current 282.0 384.5  
Deferred revenue recognized 188.6 217.2  
Distributors      
Disaggregation of Revenue [Line Items]      
Total net sales 2,209.6 1,970.0 3,620.8
Direct customers      
Disaggregation of Revenue [Line Items]      
Total net sales 2,339.7 2,300.5 3,910.3
Licensees      
Disaggregation of Revenue [Line Items]      
Total net sales 163.8 131.1 103.3
Mixed-signal Microcontrollers      
Disaggregation of Revenue [Line Items]      
Total net sales 2,355.4 2,249.7 4,272.4
Analog      
Disaggregation of Revenue [Line Items]      
Total net sales 1,329.0 1,157.0 2,016.4
Other      
Disaggregation of Revenue [Line Items]      
Total net sales 1,028.7 $ 994.9 $ 1,345.6
Long Term Supply Arrangement | Semiconductor products      
Disaggregation of Revenue [Line Items]      
Deferred revenue 365.7    
Deferred revenue, to be recognized within next 12 months 106.2    
Deferred revenue, non current $ 259.5    
Long Term Supply Arrangement | Semiconductor products | Minimum      
Disaggregation of Revenue [Line Items]      
Contract liability period 3 years    
Long Term Supply Arrangement | Semiconductor products | Maximum      
Disaggregation of Revenue [Line Items]      
Contract liability period 5 years    
Other Arrangement | Semiconductor products      
Disaggregation of Revenue [Line Items]      
Deferred revenue $ 95.5