CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net sales	$ 7,634.4	$ 8,438.7	$ 6,820.9
Cost of sales	2,638.7	2,740.8	2,371.3
Gross profit	4,995.7	5,697.9	4,449.6
Research and development	1,097.4	1,118.3	989.1
Selling, general and administrative	734.2	797.7	718.9
Amortization of acquired intangible assets	605.4	669.9	862.5
Special (income) charges and other, net	(12.3)	(4.0)	29.5
Operating expenses	2,424.7	2,581.9	2,600.0
Operating income	2,571.0	3,116.0	1,849.6
Interest income	7.6	2.1	0.5
Interest expense	(198.3)	(203.9)	(257.0)
Loss on settlement of debt	(12.2)	(8.3)	(113.4)
Other (loss) income, net	(2.2)	3.8	2.8
Income before income taxes	2,365.9	2,909.7	1,482.5
Income tax provision	459.0	672.0	197.0
Net income	$ 1,906.9	$ 2,237.7	$ 1,285.5
Basic net income per common share (in dollars per share)	$ 3.52	$ 4.07	$ 2.33
Diluted net income per common share (in dollars per share)	3.48	4.02	2.27
Dividends declared per common share (in dollars per share)	$ 1.682	$ 1.263	$ 0.910
Basic common shares outstanding (in shares)	542.0	550.4	552.3
Diluted common shares outstanding (in shares)	548.0	557.3	565.9