Acquisitions, Divestitures and Other Arrangements - Schedule of Total Consideration for the Acquisitions (Detail) - Viela Bio [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Equity value (54,988,820 shares at $53.00 per share)	$ 2,914,407
Net settlements on the exercise of stock options	78,554
Consideration for exchange of Viela stock options	1,130
Total consideration	$ 2,994,091