Commitments and Contingencies - Summary of Northrop Agreement Activity (Details) - Northrop $ in Millions	Dec. 31, 2021 USD ($)
Site Contingency [Line Items]
Total reimbursable costs under the Northrop Agreement	$ 189.7
Amount reimbursed to the Company through December 31, 2021	(149.2)
Receivable from Northrop included in the balance sheet at December 31, 2021	$ 40.5

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_SiteContingencyLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration