Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Goodwill and Intangible Assets - Amortizable Intangible Assets - (Parenthetical) (Detail) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Mar. 15, 2021	Jun. 30, 2022	Dec. 31, 2022
Viela Acquisition
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired			$ 810.0
UPLIZNA [Member] \| Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 1,460.0
Total consideration for acquisition		$ 70.0