Commitments and Contingencies - Moderna Science Centre (Details) ft² in Thousands, $ in Millions	1 Months Ended
	Sep. 30, 2021 USD ($) ft² numberOfOption	Mar. 31, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Additional payment		$ 159
Moderna Science Centre
Lessee, Lease, Description [Line Items]
Area of office space (in sqft) | ft²	462
Lease agreement for building project	2 years
Lease term	15 years
Number of extension periods | numberOfOption	2
Extension term	7 years
Additional payment	$ 1,000