Certain Transactions - Other Transactions - Additional Information (Detail) - USD ($) $ in Millions					1 Months Ended			3 Months Ended						12 Months Ended
	Nov. 26, 2023	Nov. 09, 2023	Jun. 12, 2023	May 12, 2017	Oct. 31, 2021	Aug. 31, 2021	Dec. 31, 2016	Dec. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2023	Oct. 03, 2023
Sanofi [Member] \| Collaborative Arrangement [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Upfront payment														$ 500
Milestone payment receivable															$ 500
Development and launch milestone payment receivable															$ 1,000
Johnson And Johnson [Member] \| Settlement And License Agreement Alvotech And Teva [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Maximum entry date for granting license entry			Feb. 21, 2025
Biolojic Design Ltd [Member] \| Collaborative Arrangement [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Additional development and milestone payments receivable								$ 500						500
Biolojic Design Ltd [Member] \| Research and Development Expense [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Milestone payment	$ 10
Royalty Pharma [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Collaborative agreement milestone payments		$ 100
Collaborative agreement milestone amount increase		$ 125
Royalty Pharma [Member] \| Research and Development Expense [Member] \| Collaborative Arrangement [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Reimbursement of research and development expenses incurred								$ 35
Otsuka [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Upfront payment				$ 50
Milestone payment												$ 35	$ 15
Takeda [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Upfront payment							$ 30
Milestone payment							20			$ 25
Collaborative agreement milestone payments							$ 519
Alvotech [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Collaborative agreement milestone payments														$ 400
MedinCell [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Milestone payment									$ 3
Collaborative agreement milestone payments						$ 105
MODAG [Member]
Noncash or Part Noncash Acquisitions [Line Items]
License agreement potential aggregate milestone payments amount					$ 30
MODAG [Member] \| Research and Development Expense [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Milestone payment											$ 10