Segment Information (Unaudited) Sales by Geographic Location (Details 4) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue, Geographic Location [Line Items]
Revenues	$ 9,996	$ 9,775	$ 30,347	$ 28,652
Sales percentage	100.00%	100.00%	100.00%	100.00%
United States
Revenue, Geographic Location [Line Items]
Revenues	$ 8,778	$ 8,536	$ 26,782	$ 25,045
Sales percentage	88.00%	87.00%	88.00%	87.00%
United States | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 2,388	$ 2,335	$ 7,458	$ 6,677
Sales percentage	85.00%	86.00%	86.00%	87.00%
United States | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 1,556	$ 1,495	$ 4,688	$ 4,406
Sales percentage	83.00%	81.00%	84.00%	80.00%
United States | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 2,121	$ 1,933	$ 6,098	$ 5,787
Sales percentage	83.00%	82.00%	82.00%	83.00%
United States | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 2,713	$ 2,773	$ 8,538	$ 8,175
Sales percentage	98.00%	97.00%	98.00%	97.00%
Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 378	$ 376	$ 1,114	$ 1,149
Sales percentage	4.00%	4.00%	4.00%	4.00%
Asia/Pacific | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 195	$ 163	$ 495	$ 448
Sales percentage	7.00%	6.00%	6.00%	6.00%
Asia/Pacific | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 79	$ 93	$ 243	$ 324
Sales percentage	4.00%	5.00%	4.00%	6.00%
Asia/Pacific | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 98	$ 98	$ 346	$ 310
Sales percentage	4.00%	4.00%	5.00%	4.00%
Asia/Pacific | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 6	$ 22	$ 30	$ 67
Sales percentage	0.00%	1.00%	1.00%	1.00%
Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 685	$ 640	$ 2,028	$ 1,788
Sales percentage	7.00%	7.00%	7.00%	7.00%
Europe | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 224	$ 204	$ 653	$ 543
Sales percentage	8.00%	8.00%	8.00%	7.00%
Europe | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 179	$ 146	$ 536	$ 406
Sales percentage	10.00%	8.00%	10.00%	7.00%
Europe | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 246	$ 246	$ 727	$ 712
Sales percentage	10.00%	10.00%	10.00%	10.00%
Europe | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 36	$ 44	$ 112	$ 127
Sales percentage	1.00%	2.00%	1.00%	2.00%
All other
Revenue, Geographic Location [Line Items]
Revenues	$ 155	$ 223	$ 423	$ 670
Sales percentage	1.00%	2.00%	1.00%	2.00%
All other | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 11	$ 10	$ 26	$ 25
Sales percentage	0.00%	0.00%	0.00%	0.00%
All other | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 53	$ 119	$ 133	$ 373
Sales percentage	3.00%	6.00%	2.00%	7.00%
All other | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 83	$ 88	$ 235	$ 240
Sales percentage	3.00%	4.00%	3.00%	3.00%
All other | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 8	$ 6	$ 29	$ 32
Sales percentage	1.00%	0.00%	0.00%	0.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 60	$ 54	$ 178	$ 183
Intersegment sales | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	217	197	627	549
Intersegment sales | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	275	263	849	783
Intersegment sales | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	107	108	312	374
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Geographic Location [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, Geographic Location [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, Geographic Location [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, Geographic Location [Line Items]
Revenues	$ 2,870	$ 2,953	$ 9,021	$ 8,775
Sales percentage	100.00%	100.00%	100.00%	100.00%