CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 6,820.9	$ 5,438.4	$ 5,274.2
Cost of sales	2,371.3	2,059.6	2,032.1
Gross profit	4,449.6	3,378.8	3,242.1
Research and development	989.1	836.4	877.8
Selling, general and administrative	718.9	610.3	676.6
Amortization of acquired intangible assets	862.5	932.3	993.9
Special charges and other, net	29.5	1.7	46.7
Operating expenses	2,600.0	2,380.7	2,595.0
Operating income	1,849.6	998.1	647.1
Other income (expense):
Interest income	0.5	1.7	2.8
Interest expense	(257.0)	(356.9)	(497.3)
Loss on settlement of debt	(113.4)	(299.6)	(5.4)
Other income (loss), net	2.8	(3.8)	3.2
Income before income taxes	1,482.5	339.5	150.4
Income tax provision (benefit)	197.0	(9.9)	(420.2)
Net income	$ 1,285.5	$ 349.4	$ 570.6
Basic net income per common share (in dollars per share)	$ 2.33	$ 0.67	$ 1.19
Diluted net income per common share (in dollars per share)	2.27	0.65	1.11
Dividends declared per common share (in dollars per share)	$ 0.910	$ 0.747	$ 0.733
Basic common shares outstanding (in shares)	552.3	519.2	477.7
Diluted common shares outstanding (in shares)	565.9	541.2	512.4