CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Net sales	$ 1,765.7	$ 2,169.2	$ 6,308.6	$ 6,206.0
Cost of sales	645.7	698.4	2,102.8	2,027.4
Gross profit	1,120.0	1,470.8	4,205.8	4,178.6
Research and development	266.0	282.4	857.1	820.0
Selling, general and administrative	172.2	202.9	572.4	594.2
Amortization of acquired intangible assets	151.3	167.4	454.2	502.5
Special charges (income) and other, net	1.1	6.5	4.6	(6.1)
Operating expenses	590.6	659.2	1,888.3	1,910.6
Operating income	529.4	811.6	2,317.5	2,268.0
Interest income	2.0	0.8	5.1	1.1
Interest expense	(49.2)	(52.8)	(143.2)	(156.4)
Loss on settlement of debt	0.0	0.0	(12.2)	(8.3)
Other income (loss), net	2.1	2.6	(1.0)	3.5
Income before income taxes	484.3	762.2	2,166.2	2,107.9
Income tax provision	65.1	181.9	414.0	474.2
Net income	$ 419.2	$ 580.3	$ 1,752.2	$ 1,633.7
Basic net income per common share (in dollars per share)	$ 0.78	$ 1.06	$ 3.23	$ 2.96
Diluted net income per common share (in dollars per share)	0.77	1.04	3.19	2.93
Dividends declared per common share (in dollars per share)	$ 0.439	$ 0.328	$ 1.232	$ 0.905
Basic common shares outstanding (in shares)	540.8	549.2	543.0	551.5
Diluted common shares outstanding (in shares)	546.5	555.4	549.0	558.4