CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Net sales	$ 2,073.2	$ 1,649.8	$ 4,036.8	$ 3,219.2
Cost of sales	675.3	581.5	1,329.0	1,143.3
Gross profit	1,397.9	1,068.3	2,707.8	2,075.9
Research and development	268.6	246.2	537.6	484.6
Selling, general and administrative	202.4	179.9	391.3	354.2
Amortization of acquired intangible assets	167.5	215.7	335.1	431.3
Special charges (income) and other, net	4.3	10.2	(12.6)	20.7
Operating expenses	642.8	652.0	1,251.4	1,290.8
Operating income	755.1	416.3	1,456.4	785.1
Other income (expense):
Interest income	0.2	0.1	0.3	0.4
Interest expense	(53.3)	(64.8)	(103.6)	(137.1)
Loss on settlement of debt	(2.1)	(85.2)	(8.3)	(85.5)
Other (loss) income, net	(0.8)	(1.6)	0.9	(1.1)
Income before income taxes	699.1	264.8	1,345.7	561.8
Income tax provision	152.9	22.8	292.3	67.0
Net income	$ 546.2	$ 242.0	$ 1,053.4	$ 494.8
Basic net income per common share (in dollars per share)	$ 0.99	$ 0.44	$ 1.91	$ 0.90
Diluted net income per common share (in dollars per share)	0.98	0.43	1.88	0.87
Dividends declared per common share (in dollars per share)	$ 0.3010	$ 0.2185	$ 0.5770	$ 0.4250
Basic common shares outstanding (in shares)	551.5	551.3	552.7	549.4
Diluted common shares outstanding (in shares)	558.3	565.9	559.9	565.5