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Intangible Assets and Goodwill - Intangible Assets, by Major Class (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (4,344.7)	$ (3,745.4)
Gross Amount	7,713.7	7,788.5
Net Amount	3,369.0	4,043.1
Amortization Expense
2024	674.9
2025	540.6
2026	469.9
2027	380.8
2028	$ 296.0
Minimum
Amortization Expense
Useful life	1 year
Maximum
Amortization Expense
Useful life	15 years
In-process research and development
Indefinite-lived Intangible Assets [Line Items]
In-process research and development	$ 5.7	6.4
Core and developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Amount	7,296.2	7,390.2
Accumulated Amortization	(4,103.4)	(3,571.5)
Net Amount	3,192.8	3,818.7
Customer-related
Finite-Lived Intangible Assets [Line Items]
Gross Amount	199.8	200.3
Accumulated Amortization	(128.0)	(112.4)
Net Amount	71.8	87.9
Software licenses
Finite-Lived Intangible Assets [Line Items]
Gross Amount	211.7	191.2
Accumulated Amortization	(113.0)	(61.2)
Net Amount	98.7	130.0
Distribution rights and other
Finite-Lived Intangible Assets [Line Items]
Gross Amount	0.3	0.4
Accumulated Amortization	(0.3)	(0.3)
Net Amount	$ 0.0	$ 0.1

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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