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Convertible Senior Notes (Tables)

12 Months Ended

Dec. 31, 2020

Debt Disclosure [Abstract]

Convertible senior notes net of discounts and deferred financing costs

The 2024 Notes, net of discounts and deferred financing costs, consisted of the following:

			December 31,
(in millions)			2020						2019
Principal			$	381.3					$	517.5
Deferred financing costs			(4.0)						(6.9)
Debt discount, net			(59.4)						(101.8)
Net carrying amount			$	317.9					$	408.8

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- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

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