Segment Information Sales by Contract Type (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue, Contract Type [Line Items]
Sales	$ 39,290	$ 36,602	$ 35,667
Sales percentage	100.00%	100.00%	100.00%
Operating Segments [Member] | Aeronautics Systems
Revenue, Contract Type [Line Items]
Sales	$ 10,786	$ 10,531	$ 11,259
Sales percentage	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems
Revenue, Contract Type [Line Items]
Sales	$ 5,862	$ 5,579	$ 5,776
Sales percentage	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 10,895	$ 10,396	$ 10,134
Sales percentage	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems
Revenue, Contract Type [Line Items]
Sales	$ 13,946	$ 12,275	$ 10,608
Sales percentage	100.00%	100.00%	100.00%
Cost-type
Revenue, Contract Type [Line Items]
Sales	$ 20,979	$ 18,711	$ 18,028
Sales percentage	53.00%	51.00%	51.00%
Cost-type | Aeronautics Systems
Revenue, Contract Type [Line Items]
Sales	$ 5,235	$ 5,013	$ 5,419
Sales percentage	50.00%	49.00%	49.00%
Cost-type | Defense Systems
Revenue, Contract Type [Line Items]
Sales	$ 1,591	$ 1,497	$ 1,739
Sales percentage	31.00%	31.00%	35.00%
Cost-type | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 4,116	$ 3,622	$ 3,139
Sales percentage	42.00%	39.00%	34.00%
Cost-type | Space Systems
Revenue, Contract Type [Line Items]
Sales	$ 10,037	$ 8,579	$ 7,731
Sales percentage	73.00%	71.00%	74.00%
Fixed-price
Revenue, Contract Type [Line Items]
Sales	$ 18,311	$ 17,891	$ 17,639
Sales percentage	47.00%	49.00%	49.00%
Fixed-price | Aeronautics Systems
Revenue, Contract Type [Line Items]
Sales	$ 5,311	$ 5,279	$ 5,651
Sales percentage	50.00%	51.00%	51.00%
Fixed-price | Defense Systems
Revenue, Contract Type [Line Items]
Sales	$ 3,473	$ 3,276	$ 3,248
Sales percentage	69.00%	69.00%	65.00%
Fixed-price | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 5,725	$ 5,759	$ 6,002
Sales percentage	58.00%	61.00%	66.00%
Fixed-price | Space Systems
Revenue, Contract Type [Line Items]
Sales	$ 3,802	$ 3,577	$ 2,738
Sales percentage	27.00%	29.00%	26.00%
Intersegment Sales [Member] | Aeronautics Systems
Revenue, Contract Type [Line Items]
Sales	$ 240	$ 239	$ 189
Intersegment Sales [Member] | Defense Systems
Revenue, Contract Type [Line Items]
Sales	798	806	789
Intersegment Sales [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	1,054	1,015	993
Intersegment Sales [Member] | Space Systems
Revenue, Contract Type [Line Items]
Sales	$ 107	$ 119	$ 139