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Intangible Assets and Goodwill (Tables)
 9 Months Ended
Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets
Net amounts excluding fully amortized intangible assets, consist of the following (in millions):
December 31, 2025
Gross AmountAccumulated AmortizationNet Amount
Core and developed technology$7,206.7 $(5,278.1)$1,928.6 
Customer-related202.5 (162.2)40.3 
In-process research and development7.1 — 7.1 
Software licenses285.9 (162.8)123.1 
Total$7,702.2 $(5,603.1)$2,099.1 
March 31, 2025
Gross AmountAccumulated AmortizationNet Amount
Core and developed technology$7,149.9 $(4,981.6)$2,168.3 
Customer-related199.5 (152.8)46.7 
In-process research and development50.8 — 50.8 
Software licenses259.3 (136.1)123.2 
Total$7,659.5 $(5,270.5)$2,389.0 
Schedule of Indefinite Lived Intangible Assets
Net amounts excluding fully amortized intangible assets, consist of the following (in millions):
December 31, 2025
Gross AmountAccumulated AmortizationNet Amount
Core and developed technology$7,206.7 $(5,278.1)$1,928.6 
Customer-related202.5 (162.2)40.3 
In-process research and development7.1 — 7.1 
Software licenses285.9 (162.8)123.1 
Total$7,702.2 $(5,603.1)$2,099.1 
March 31, 2025
Gross AmountAccumulated AmortizationNet Amount
Core and developed technology$7,149.9 $(4,981.6)$2,168.3 
Customer-related199.5 (152.8)46.7 
In-process research and development50.8 — 50.8 
Software licenses259.3 (136.1)123.2 
Total$7,659.5 $(5,270.5)$2,389.0 
Schedule of Projected Amortization Expense
The following is an expected amortization schedule for the intangible assets for the remainder of fiscal 2026 through fiscal 2030, absent any future acquisitions or impairment charges (in millions):
Fiscal Year Ending March 31,Amortization Expense
2026$134.8 
2027$451.5 
2028$344.7 
2029$269.8 
2030$257.8 
Schedule of Amortization Expense by Intangible Asset Class Amortization expense attributed to intangible assets are assigned to cost of sales and operating expenses as follows (in millions):
Three Months Ended December 31,Nine Months Ended December 31,
2025202420252024
Amortization expense charged to cost of sales$5.3 $6.1 $15.5 $13.7 
Amortization expense charged to operating expense128.7 140.3 383.8 424.8 
Total amortization expense$134.0 $146.4 $399.3 $438.5 
Schedule of Goodwill Activity
Goodwill activity by segment was as follows (in millions):
 Semiconductor Products Reporting UnitTechnology Licensing Reporting Unit
Balance at March 31, 2025$6,665.6 $19.2 
Additions due to acquisition10.7 — 
Balance at December 31, 2025$6,676.3 $19.2 

At March 31, 2025, the Company applied a qualitative goodwill impairment test to its two reporting units, and concluded that goodwill was not impaired. Through December 31, 2025, the Company has never recorded a goodwill impairment charge.