Segment Information (Unaudited) Sales by Geographic Location (Details 4) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue, Geographic Location [Line Items]
Sales	$ 8,971	$ 8,720	$ 26,569	$ 27,028
Sales percentage	100.00%	100.00%	100.00%	100.00%
United States
Revenue, Geographic Location [Line Items]
Sales	$ 7,761	$ 7,535	$ 23,063	$ 23,277
Sales percentage	87.00%	87.00%	87.00%	86.00%
United States | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,138	$ 2,317	$ 6,581	$ 7,381
Sales percentage	85.00%	87.00%	87.00%	86.00%
United States | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 839	$ 887	$ 2,422	$ 2,810
Sales percentage	72.00%	74.00%	72.00%	74.00%
United States | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 1,754	$ 1,775	$ 5,414	$ 5,540
Sales percentage	79.00%	81.00%	81.00%	81.00%
United States | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 3,030	$ 2,556	$ 8,646	$ 7,546
Sales percentage	97.00%	97.00%	97.00%	97.00%
Asia/Pacific
Revenue, Geographic Location [Line Items]
Sales	$ 469	$ 470	$ 1,421	$ 1,469
Sales percentage	5.00%	5.00%	5.00%	5.00%
Asia/Pacific | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 165	$ 239	$ 560	$ 722
Sales percentage	7.00%	9.00%	7.00%	9.00%
Asia/Pacific | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 112	$ 107	$ 340	$ 336
Sales percentage	10.00%	9.00%	10.00%	9.00%
Asia/Pacific | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 159	$ 114	$ 435	$ 372
Sales percentage	7.00%	5.00%	6.00%	5.00%
Asia/Pacific | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 33	$ 10	$ 86	$ 39
Sales percentage	1.00%	0.00%	1.00%	0.00%
Europe
Revenue, Geographic Location [Line Items]
Sales	$ 543	$ 498	$ 1,529	$ 1,568
Sales percentage	6.00%	6.00%	6.00%	6.00%
Europe | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 163	$ 108	$ 413	$ 335
Sales percentage	7.00%	4.00%	5.00%	4.00%
Europe | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 101	$ 78	$ 297	$ 233
Sales percentage	9.00%	6.00%	9.00%	6.00%
Europe | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 210	$ 233	$ 654	$ 744
Sales percentage	10.00%	11.00%	10.00%	11.00%
Europe | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 69	$ 79	$ 165	$ 256
Sales percentage	2.00%	3.00%	2.00%	3.00%
All other
Revenue, Geographic Location [Line Items]
Sales	$ 198	$ 217	$ 556	$ 714
Sales percentage	2.00%	2.00%	2.00%	3.00%
All other | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 13	$ 13	$ 39	$ 53
Sales percentage	1.00%	0.00%	1.00%	1.00%
All other | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 99	$ 131	$ 296	$ 433
Sales percentage	9.00%	11.00%	9.00%	11.00%
All other | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 83	$ 70	$ 211	$ 222
Sales percentage	4.00%	3.00%	3.00%	3.00%
All other | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 3	$ 3	$ 10	$ 6
Sales percentage	0.00%	0.00%	0.00%	0.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 58	$ 48	$ 181	$ 137
Intersegment sales | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	194	206	567	586
Intersegment sales | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	250	244	755	735
Intersegment sales | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	28	33	90	103
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,537	$ 2,725	$ 7,774	$ 8,628
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 1,345	$ 1,409	$ 3,922	$ 4,398
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,456	$ 2,436	$ 7,469	$ 7,613
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 3,163	$ 2,681	$ 8,997	$ 7,950
Sales percentage	100.00%	100.00%	100.00%	100.00%