Information on Business Segments - Total Assets and Customer Advances and Amounts In Excess Of Costs Incurred For Each Business Segment (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Assets	$ 50,873	$ 50,710
Operating Segments
Segment Reporting Information [Line Items]
Assets	39,862	39,355
Operating Segments | Aeronautics
Segment Reporting Information [Line Items]
Assets	10,756	9,903
Operating Segments | Missiles and Fire Control
Segment Reporting Information [Line Items]
Assets	5,243	4,966
Operating Segments | Rotary and Mission Systems
Segment Reporting Information [Line Items]
Assets	17,664	18,035
Operating Segments | Space
Segment Reporting Information [Line Items]
Assets	6,199	6,451
Corporate assets
Segment Reporting Information [Line Items]
Assets	$ 11,011	$ 11,355