Intangible Assets and Goodwill (Tables)

12 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets, Indefinite-Lived

Net amounts excluding fully amortized intangible assets, consist of the following (in millions):

	March 31, 2024
	Gross Amount		Accumulated Amortization		Net Amount
Core and developed technology	$	7,221.3	$	(4,590.9)	$	2,630.4
Customer-related	196.7		(140.8)		55.9
Software licenses	230.7		(135.2)		95.5
Total	$	7,648.7	$	(4,866.9)	$	2,781.8

	March 31, 2023
	Gross Amount		Accumulated Amortization		Net Amount
Core and developed technology	$	7,296.2	$	(4,103.4)	$	3,192.8
Customer-related	199.8		(128.0)		71.8
In-process research and development	5.7		—		5.7
Software licenses	211.7		(113.0)		98.7
Distribution rights and other	0.3		(0.3)		—
Total	$	7,713.7	$	(4,344.7)	$	3,369.0

Schedule of Intangible Assets, Finite-Lived

Net amounts excluding fully amortized intangible assets, consist of the following (in millions):

	March 31, 2024
	Gross Amount		Accumulated Amortization		Net Amount
Core and developed technology	$	7,221.3	$	(4,590.9)	$	2,630.4
Customer-related	196.7		(140.8)		55.9
Software licenses	230.7		(135.2)		95.5
Total	$	7,648.7	$	(4,866.9)	$	2,781.8

	March 31, 2023
	Gross Amount		Accumulated Amortization		Net Amount
Core and developed technology	$	7,296.2	$	(4,103.4)	$	3,192.8
Customer-related	199.8		(128.0)		71.8
In-process research and development	5.7		—		5.7
Software licenses	211.7		(113.0)		98.7
Distribution rights and other	0.3		(0.3)		—
Total	$	7,713.7	$	(4,344.7)	$	3,369.0

Schedule of Projected Amortization Expense

The following is an expected amortization schedule for the intangible assets for fiscal 2025 through fiscal 2029, absent any future acquisitions or impairment charges (in millions):

Fiscal Year Ending March 31,	Amortization Expense
2025	$	561.3
2026	$	489.8
2027	$	388.8
2028	$	300.2
2029	$	230.5

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):

	Fiscal Year Ended March 31,
	2024		2023		2022
Amortization expense charged to cost of sales	$	12.2	$	15.8	$	12.4
Amortization expense charged to operating expense	676.9		737.9		922.0
Total amortization expense	$	689.1	$	753.7	$	934.4

Schedule of Goodwill Activity

Goodwill activity by segment was as follows (in millions):

	Semiconductor Products Reporting Unit		Technology Licensing Reporting Unit
Balance at March 31, 2022	$	6,654.4	$	19.2
Additions	—		—
Balance at March 31, 2023	$	6,654.4	$	19.2
Additions	1.8		—
Balance at March 31, 2024	$	6,656.2	$	19.2

At March 31, 2024, the Company applied a qualitative goodwill impairment test to its two reporting units, and concluded that goodwill was not impaired. Through March 31, 2024, the Company has never recorded a goodwill impairment charge.