Summary of Significant Accounting Policies (Details) $ in Thousands, member in Millions	1 Months Ended		3 Months Ended			9 Months Ended
	Jul. 31, 2023 USD ($)	May 31, 2023	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) member segment	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Foreign currency translation adjustment			$ (11,900)			$ (11,900)		$ (6,400)
Foreign currency transaction gain (loss)			(12,200)		$ (38,600)	$ 3,900	$ (59,600)
Number of business segments | segment						1
Cash, cash equivalents, and restricted cash			666,363		$ 1,293,022	$ 666,363	1,293,022	$ 1,348,845	$ 1,528,259
Net loss						(366,700)
Net cash provided by (used in) operating activities						$ (537,186)	(298,121)
Number of population members (less than) | member						1
Contract with customer, liability, deductions						$ 171,288	251,576
Global workforce percent		25.00%
Restructuring and related cost percent		20.00%
Severance and employee benefit costs						4,503
Impairment of assets				$ 10,100		10,081	$ 0
Canada APA
Summary Of Significant Accounting Policies [Line Items]
Installment charges	$ 174,800					174,800
Collaboration agreement upfront payment amount			100,400			100,400
Joint Committee on Vaccination and Immunization (JCVI)
Summary Of Significant Accounting Policies [Line Items]
Contract with customer, liability, deductions			112,500			112,500
Gavi Advance Purchase Agreement- COVAX Facility
Summary Of Significant Accounting Policies [Line Items]
Collaboration agreement upfront payment amount			$ 696,400			$ 696,400