Grant Revenue (Details) $ in Millions	1 Months Ended				6 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($)	Sep. 30, 2020 USD ($)	Apr. 30, 2020 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2021 USD ($) participant	Dec. 31, 2021 USD ($) participant	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)
Disaggregation of Revenue [Line Items]
Number of participants | participant					30,000	30,000
Contract option exercised					$ 6,868	$ 6,868	$ 2,711
DARPA
Disaggregation of Revenue [Line Items]
Award amount		$ 56
DARPA | Contract options
Disaggregation of Revenue [Line Items]
Amount committed for funding							6
Available funding							24
BARDA
Disaggregation of Revenue [Line Items]
Award amount			$ 483	$ 126	$ 1,700	$ 117
Amount committed for funding							137
Potential reimbursements	$ 308
BARDA | Contract options
Disaggregation of Revenue [Line Items]
Available funding								$ 36
The Bill & Melinda Gates Foundation | Initial project
Disaggregation of Revenue [Line Items]
Available funding							6
Contract option exercised							$ 80