Fair Value of Financial Instruments (Tables)

3 Months Ended

Jun. 30, 2021

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):

	June 30, 2021				March 31, 2021
	Carrying Amount(1)		Fair Value		Carrying Amount(1)		Fair Value
Revolving Credit Facility	$	1,949.8	$	1,958.6	$	2,336.6	$	2,346.6
3.922% 2021 Notes	—		—		999.0		1,004.3
4.333% 2023 Notes	993.1		1,062.1		992.3		1,022.4
2.670% 2023 Notes	996.8		1,041.4		996.4		1,040.8
0.972% 2024 Notes	1,394.7		1,396.6		1,394.2		1,394.0
0.983% 2024 Notes	995.3		995.5		—		—
4.250% 2025 Notes	1,186.2		1,260.2		1,185.5		1,252.6
2015 Senior Convertible Debt	121.8		459.3		120.6		485.4
2017 Senior Convertible Debt	262.9		729.1		260.2		731.4
2020 Senior Convertible Debt	562.6		754.9		555.6		778.3
2017 Junior Convertible Debt	64.2		276.0		63.7		272.9
Total	$	8,527.4	$	9,933.7	$	8,904.1	$	10,328.7

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