Intangible Assets and Goodwill - Intangible Assets, by Major Class (Details) - USD ($) $ in Millions	Mar. 31, 2024	Mar. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (4,866.9)	$ (4,344.7)
Gross Amount	7,648.7	7,713.7
Net Amount	2,781.8	3,369.0
Amortization Expense
2025	561.3
2026	489.8
2027	388.8
2028	300.2
2029	$ 230.5
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
Core and developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 7,221.3	7,296.2
Accumulated Amortization	(4,590.9)	(4,103.4)
Net Amount	2,630.4	3,192.8
Customer-related
Finite-Lived Intangible Assets [Line Items]
Gross Amount	196.7	199.8
Accumulated Amortization	(140.8)	(128.0)
Net Amount	55.9	71.8
Software licenses
Finite-Lived Intangible Assets [Line Items]
Gross Amount	230.7	211.7
Accumulated Amortization	(135.2)	(113.0)
Net Amount	$ 95.5	98.7
Distribution rights and other
Finite-Lived Intangible Assets [Line Items]
Gross Amount		0.3
Accumulated Amortization		(0.3)
Net Amount		$ 0.0