Segment Information Sales by Contract Type (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue, Contract Type [Line Items]
Sales	$ 35,667	$ 36,799	$ 33,841
Sales percentage	100.00%	100.00%	100.00%
Operating Segments [Member] | Aeronautics Systems
Revenue, Contract Type [Line Items]
Sales	$ 11,259	$ 12,169	$ 11,116
Sales percentage	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems
Revenue, Contract Type [Line Items]
Sales	$ 5,776	$ 7,543	$ 7,495
Sales percentage	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 10,134	$ 10,080	$ 9,410
Sales percentage	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems
Revenue, Contract Type [Line Items]
Sales	$ 10,608	$ 8,744	$ 7,425
Sales percentage	100.00%	100.00%	100.00%
Cost-type
Revenue, Contract Type [Line Items]
Sales	$ 18,028	$ 18,438	$ 16,479
Sales percentage	51.00%	50.00%	49.00%
Cost-type | Aeronautics Systems
Revenue, Contract Type [Line Items]
Sales	$ 5,419	$ 6,142	$ 5,299
Sales percentage	49.00%	51.00%	48.00%
Cost-type | Defense Systems
Revenue, Contract Type [Line Items]
Sales	$ 1,739	$ 2,345	$ 2,509
Sales percentage	35.00%	34.00%	37.00%
Cost-type | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 3,139	$ 3,582	$ 3,335
Sales percentage	34.00%	39.00%	38.00%
Cost-type | Space Systems
Revenue, Contract Type [Line Items]
Sales	$ 7,731	$ 6,369	$ 5,336
Sales percentage	74.00%	74.00%	73.00%
Fixed-price
Revenue, Contract Type [Line Items]
Sales	$ 17,639	$ 18,361	$ 17,362
Sales percentage	49.00%	50.00%	51.00%
Fixed-price | Aeronautics Systems
Revenue, Contract Type [Line Items]
Sales	$ 5,651	$ 5,905	$ 5,714
Sales percentage	51.00%	49.00%	52.00%
Fixed-price | Defense Systems
Revenue, Contract Type [Line Items]
Sales	$ 3,248	$ 4,470	$ 4,295
Sales percentage	65.00%	66.00%	63.00%
Fixed-price | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 6,002	$ 5,719	$ 5,347
Sales percentage	66.00%	61.00%	62.00%
Fixed-price | Space Systems
Revenue, Contract Type [Line Items]
Sales	$ 2,738	$ 2,267	$ 2,006
Sales percentage	26.00%	26.00%	27.00%
Intersegment Sales [Member] | Aeronautics Systems
Revenue, Contract Type [Line Items]
Sales	$ 189	$ 122	$ 103
Intersegment Sales [Member] | Defense Systems
Revenue, Contract Type [Line Items]
Sales	789	728	691
Intersegment Sales [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	993	779	728
Intersegment Sales [Member] | Space Systems
Revenue, Contract Type [Line Items]
Sales	$ 139	$ 108	$ 83