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Fair Value of Financial Instruments (Tables)

3 Months Ended

Jun. 30, 2025

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, 2025												March 31, 2025
			Carrying Amount(1)						Fair Value						Carrying Amount(1)						Fair Value
Commercial Paper			$	—					$	—					$	174.9					$	175.0
4.250% 2025 Notes			1,199.4						1,199.0						1,198.5						1,196.9
4.900% 2028 Notes			995.5						1,012.0						995.0						1,002.5
5.050% 2029 Notes			994.3						1,015.9						993.9						1,005.8
5.050% 2030 Notes			994.4						1,014.7						994.2						996.9
2017 Senior Convertible Debt			37.9						76.2						37.9						57.7
2024 Senior Convertible Debt			1,236.6						1,229.6						1,236.0						1,173.4
Total			$	5,458.1					$	5,547.4					$	5,630.4					$	5,608.2

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

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- Definition

Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements.

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