Segment Information (Unaudited) Sales by Geographic Location (Details 4) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue, Geographic Location [Line Items]
Sales	$ 9,775	$ 8,971	$ 28,652	$ 26,569
Sales percentage	100.00%	100.00%	100.00%	100.00%
United States
Revenue, Geographic Location [Line Items]
Sales	$ 8,536	$ 7,761	$ 25,045	$ 23,063
Sales percentage	87.00%	87.00%	87.00%	87.00%
United States | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,335	$ 2,138	$ 6,677	$ 6,581
Sales percentage	86.00%	85.00%	87.00%	87.00%
United States | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 860	$ 839	$ 2,547	$ 2,422
Sales percentage	70.00%	72.00%	70.00%	72.00%
United States | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 1,933	$ 1,754	$ 5,787	$ 5,414
Sales percentage	82.00%	79.00%	83.00%	81.00%
United States | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 3,408	$ 3,030	$ 10,034	$ 8,646
Sales percentage	98.00%	97.00%	98.00%	97.00%
Asia/Pacific
Revenue, Geographic Location [Line Items]
Sales	$ 376	$ 469	$ 1,149	$ 1,421
Sales percentage	4.00%	5.00%	4.00%	5.00%
Asia/Pacific | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 163	$ 165	$ 448	$ 560
Sales percentage	6.00%	7.00%	6.00%	7.00%
Asia/Pacific | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 93	$ 112	$ 324	$ 340
Sales percentage	8.00%	10.00%	9.00%	10.00%
Asia/Pacific | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 98	$ 159	$ 310	$ 435
Sales percentage	4.00%	7.00%	4.00%	6.00%
Asia/Pacific | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 22	$ 33	$ 67	$ 86
Sales percentage	1.00%	1.00%	1.00%	1.00%
Europe
Revenue, Geographic Location [Line Items]
Sales	$ 640	$ 543	$ 1,788	$ 1,529
Sales percentage	7.00%	6.00%	7.00%	6.00%
Europe | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 204	$ 163	$ 543	$ 413
Sales percentage	8.00%	7.00%	7.00%	5.00%
Europe | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 146	$ 101	$ 406	$ 297
Sales percentage	12.00%	9.00%	11.00%	9.00%
Europe | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 246	$ 210	$ 712	$ 654
Sales percentage	10.00%	10.00%	10.00%	10.00%
Europe | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 44	$ 69	$ 127	$ 165
Sales percentage	1.00%	2.00%	1.00%	2.00%
All other
Revenue, Geographic Location [Line Items]
Sales	$ 223	$ 198	$ 670	$ 556
Sales percentage	2.00%	2.00%	2.00%	2.00%
All other | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 10	$ 13	$ 25	$ 39
Sales percentage	0.00%	1.00%	0.00%	1.00%
All other | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 119	$ 99	$ 373	$ 296
Sales percentage	10.00%	9.00%	10.00%	9.00%
All other | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 88	$ 83	$ 240	$ 211
Sales percentage	4.00%	4.00%	3.00%	3.00%
All other | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 6	$ 3	$ 32	$ 10
Sales percentage	0.00%	0.00%	0.00%	0.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 54	$ 58	$ 183	$ 181
Intersegment sales | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	203	194	567	567
Intersegment sales | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	263	250	783	755
Intersegment sales | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	26	28	84	90
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,766	$ 2,537	$ 7,876	$ 7,774
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 1,421	$ 1,345	$ 4,217	$ 3,922
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,628	$ 2,456	$ 7,832	$ 7,469
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 3,506	$ 3,163	$ 10,344	$ 8,997
Sales percentage	100.00%	100.00%	100.00%	100.00%