Segment Information Segment Assets Reconciliation (Table) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 10,627	$ 8,157	$ 7,031
Ingalls [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,659	1,612	1,618
Newport News Shipbuilding [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,179	4,124	3,886
Technical Solutions [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	3,553	1,379	1,022
Corporate Segment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 1,236	$ 1,042	$ 505