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Income Taxes - Income Tax (Benefit) Provision from Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Income (loss) before income taxes:
U.S.	$ 674.7	$ 132.2	$ (301.7)
Foreign	2,235.0	1,350.3	641.2
Income before income taxes	2,909.7	1,482.5	339.5
Current provision (benefit):
U.S. Federal	389.5	191.6	54.8
State	5.0	3.7	2.0
Foreign	72.0	(6.2)	72.2
Total current provision	466.5	189.1	129.0
Deferred provision (benefit):
U.S. Federal	53.7	(78.7)	(215.4)
State	4.6	(9.1)	(22.9)
Foreign	147.2	95.7	99.4
Total deferred provision (benefit)	205.5	7.9	(138.9)
Income tax provision (benefit)	672.0	197.0	(9.9)
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Computed expected income tax provision	611.0	311.3	71.3
State income taxes, net of federal benefit	8.6	3.5	(3.8)
Effects of foreign operations - rate differential	(184.0)	(96.8)	(37.7)
Effects of foreign operations - other, net of foreign tax credits	258.9	139.9	122.5
Foreign-derived intangible income ("FDII")	0.0	(27.3)	(10.5)
Business realignment of intellectual property rights	0.0	(3.1)	(63.8)
Change in uncertain tax positions	50.6	(47.1)	28.1
Share-based compensation	(11.4)	(17.6)	(12.3)
R&D tax credits	(63.8)	(49.5)	(47.6)
Income tax holidays	(26.7)	(22.5)	(11.1)
Convertible debt settlement	0.7	(25.5)	(48.1)
Other	19.0	31.7	16.4
Change in valuation allowance	9.1	0.0	(13.3)
Income tax provision (benefit)	$ 672.0	$ 197.0	$ (9.9)

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in income tax contingencies. Including, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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