Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets consist of the following:

		As of December 31,
		2022						2021
(In millions)	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross carrying Amount		Accumulated Amortization		Net Carrying Amount
Acquired product rights - Libtayo	13 years	$	946.3	$	(35.7)	$	910.6	$	—	$	—	$	—
Other intangibles	5–8 years	10.0		(5.1)		4.9		29.3		(22.6)		6.7
Intangible assets, net		$	956.3	$	(40.8)	$	915.5	$	29.3	$	(22.6)	$	6.7