Fair Value of Financial Instruments (Tables)

12 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Summary of Carrying Amount and Fair Values

The following table shows the carrying amounts and fair values of the Company's debt obligations (in millions):

	March 31,
	2024				2023
	Carrying Amount(1)		Fair Value		Carrying Amount(1)		Fair Value
Revolving Credit Facility	$	—	$	—	$	91.4	$	100.0
2025 Term Loan Facility	749.3		750.0		—		—
Commercial Paper	1,355.1		1,359.0		—		—
4.333% 2023 Notes	—		—		999.4		997.1
2.670% 2023 Notes	—		—		999.4		985.4
0.972% 2024 Notes	—		—		1,398.2		1,337.6
0.983% 2024 Notes	999.4		979.6		997.9		941.9
4.250% 2025 Notes	1,195.0		1,181.8		1,191.8		1,176.0
5.050% 2029 Notes	992.6		1,000.6		—		—
2015 Senior Convertible Debt	6.7		25.6		12.4		41.8
2017 Senior Convertible Debt	37.9		101.3		81.8		189.6
2020 Senior Convertible Debt	663.8		708.8		661.1		732.1
2017 Junior Convertible Debt	—		—		6.5		14.5
Total	$	5,999.8	$	6,106.7	$	6,439.9	$	6,516.0

(1) The carrying amounts presented are net of debt discounts and debt issuance costs (see Note 5 for further information).