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Share-Based Compensation (Tables)

12 Months Ended

Mar. 31, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Share-based Compensation Expense

The following table presents the details of the Company's share-based compensation expense (in millions):

			Fiscal Year Ended March 31,
			2025						2024						2023
Cost of sales (1)			$	21.8					$	25.6					$	27.2
Research and development			104.6						94.3						83.1
Selling, general and administrative			54.0						57.6						60.1
Pre-tax effect of share-based compensation			180.4						177.5						170.4
Income tax benefit			37.9						37.5						36.4
Net income effect of share-based compensation			$	142.5					$	140.0					$	134.0

(1) During the fiscal year ended March 31, 2025, $17.4 million of share-based compensation expense was capitalized to inventory and $21.8 million of previously capitalized share-based compensation expense in inventory was sold. During the fiscal year ended March 31, 2024, $19.0 million of share-based compensation expense was capitalized to inventory and $25.6 million of previously capitalized share-based compensation expense in inventory was sold. During the fiscal year ended March 31, 2023, $19.7 million of share-based compensation expense was capitalized to inventory and $27.2 million of previously capitalized share-based compensation expense in inventory was sold.

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

RSUs share activity is set forth below:

			Number of Shares						Weighted Average Grant Date Fair Value
Nonvested shares at March 31, 2022			9,848,955						$	52.74
Granted			3,054,320						$	61.76
Forfeited			(815,738)						$	55.14
Vested			(3,423,935)						$	45.08
Nonvested shares at March 31, 2023			8,663,602						$	58.72
Granted			2,535,772						$	77.28
Forfeited			(474,397)						$	64.37
Vested			(2,510,781)						$	48.56
Nonvested shares at March 31, 2024			8,214,196						$	67.22
Granted			4,921,190						$	70.74
Forfeited			(1,191,134)						$	71.27
Vested			(2,365,815)						$	60.12
Nonvested shares at March 31, 2025			9,578,437						$	70.28

Schedule of Share-based Compensation, Performance Stock Units Award Activity

PSUs share activity is set forth below:

			Number of Shares						Weighted Average Grant Date Fair Value
Nonvested shares at March 31, 2022			257,060						$	74.76
Granted			172,334						$	60.88
Forfeited			(48,524)						$	66.71
Vested			—						$	—
Nonvested shares at March 31, 2023			380,870						$	69.51
Granted			123,747						$	77.61
Forfeited			(2,883)						$	100.20
Vested			—						$	—
Nonvested shares at March 31, 2024			501,734						$	71.33
Granted			183,304						$	71.92
Forfeited			(207,481)						$	72.21
Vested			(159,293)						$	70.71
Nonvested shares at March 31, 2025			318,264						$	71.45

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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