Segment Information (Unaudited) Sales by Contract Type (Details 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue, Contract Type [Line Items]
Revenues	$ 9,996	$ 9,775	$ 30,347	$ 28,652
Sales percentage	100.00%	100.00%	100.00%	100.00%
Cost-type [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 5,252	$ 5,261	$ 15,742	$ 15,574
Sales percentage	53.00%	54.00%	52.00%	54.00%
Cost-type [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,296	$ 1,370	$ 3,990	$ 3,920
Sales percentage	46.00%	51.00%	46.00%	51.00%
Cost-type [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 990	$ 1,007	$ 2,933	$ 3,017
Sales percentage	53.00%	54.00%	52.00%	55.00%
Cost-type [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,216	$ 1,002	$ 3,390	$ 2,920
Sales percentage	48.00%	42.00%	46.00%	41.00%
Cost-type [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,750	$ 1,882	$ 5,429	$ 5,717
Sales percentage	63.00%	66.00%	62.00%	68.00%
Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 4,744	$ 4,514	$ 14,605	$ 13,078
Sales percentage	47.00%	46.00%	48.00%	46.00%
Fixed-price [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,522	$ 1,342	$ 4,642	$ 3,773
Sales percentage	54.00%	49.00%	54.00%	49.00%
Fixed-price [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 877	$ 846	$ 2,667	$ 2,492
Sales percentage	47.00%	46.00%	48.00%	45.00%
Fixed-price [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,332	$ 1,363	$ 4,016	$ 4,129
Sales percentage	52.00%	58.00%	54.00%	59.00%
Fixed-price [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,013	$ 963	$ 3,280	$ 2,684
Sales percentage	37.00%	34.00%	38.00%	32.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 60	$ 54	$ 178	$ 183
Intersegment sales | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	217	197	627	549
Intersegment sales | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	275	263	849	783
Intersegment sales | Space Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	107	108	312	374
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 2,878	$ 2,766	$ 8,810	$ 7,876
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 2,084	$ 2,050	$ 6,227	$ 6,058
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 2,823	$ 2,628	$ 8,255	$ 7,832
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 2,870	$ 2,953	$ 9,021	$ 8,775
Sales percentage	100.00%	100.00%	100.00%	100.00%