Fair Value of Financial Instruments (Tables)

9 Months Ended

Dec. 31, 2023

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):

	December 31, 2023				March 31, 2023
	Carrying Amount(1)		Fair Value		Carrying Amount(1)		Fair Value
Revolving Credit Facility	$	—	$	—	$	91.4	$	100.0
2025 Term Loan Facility	749.2		750.0		—		—
Commercial Paper	645.8		647.0		—		—
4.333% 2023 Notes	—		—		999.4		997.1
2.670% 2023 Notes	—		—		999.4		985.4
0.972% 2024 Notes	1,399.7		1,391.6		1,398.2		1,337.6
0.983% 2024 Notes	999.0		968.6		997.9		941.9
4.250% 2025 Notes	1,194.1		1,181.3		1,191.8		1,176.0
2015 Senior Convertible Debt	6.7		22.9		12.4		41.8
2017 Senior Convertible Debt	37.8		81.1		81.8		189.6
2020 Senior Convertible Debt	663.1		726.7		661.1		732.1
2017 Junior Convertible Debt	—		—		6.5		14.5
Total	$	5,695.4	$	5,769.2	$	6,439.9	$	6,516.0

(1) The carrying amounts presented are net of debt discounts and debt issuance costs (see Note 6 for further information).