Segment Information (Unaudited) Sales by Geographic Location (Details 4) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue, Geographic Location [Line Items]
Sales	$ 8,801	$ 9,151	$ 17,598	$ 18,308
Sales percentage	100.00%	100.00%	100.00%	100.00%
United States
Revenue, Geographic Location [Line Items]
Sales	$ 7,646	$ 7,943	$ 15,302	$ 15,742
Sales percentage	87.00%	86.00%	87.00%	86.00%
United States | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,148	$ 2,517	$ 4,443	$ 5,064
Sales percentage	87.00%	88.00%	86.00%	87.00%
United States | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 792	$ 897	$ 1,583	$ 1,923
Sales percentage	71.00%	73.00%	72.00%	73.00%
United States | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 1,842	$ 1,915	$ 3,660	$ 3,765
Sales percentage	81.00%	82.00%	81.00%	80.00%
United States | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,864	$ 2,614	$ 5,616	$ 4,990
Sales percentage	97.00%	97.00%	97.00%	96.00%
Asia/Pacific
Revenue, Geographic Location [Line Items]
Sales	$ 489	$ 441	$ 952	$ 999
Sales percentage	6.00%	5.00%	5.00%	5.00%
Asia/Pacific | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 205	$ 204	$ 395	$ 483
Sales percentage	8.00%	7.00%	8.00%	8.00%
Asia/Pacific | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 123	$ 126	$ 228	$ 229
Sales percentage	11.00%	10.00%	10.00%	9.00%
Asia/Pacific | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 137	$ 98	$ 276	$ 258
Sales percentage	6.00%	4.00%	6.00%	6.00%
Asia/Pacific | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 24	$ 13	$ 53	$ 29
Sales percentage	1.00%	0.00%	1.00%	1.00%
Europe
Revenue, Geographic Location [Line Items]
Sales	$ 483	$ 537	$ 986	$ 1,070
Sales percentage	5.00%	6.00%	6.00%	6.00%
Europe | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 113	$ 127	$ 250	$ 227
Sales percentage	5.00%	4.00%	5.00%	4.00%
Europe | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 95	$ 79	$ 196	$ 155
Sales percentage	8.00%	6.00%	9.00%	6.00%
Europe | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 219	$ 242	$ 444	$ 511
Sales percentage	10.00%	11.00%	10.00%	11.00%
Europe | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 56	$ 89	$ 96	$ 177
Sales percentage	2.00%	3.00%	2.00%	3.00%
All other
Revenue, Geographic Location [Line Items]
Sales	$ 183	$ 230	$ 358	$ 497
Sales percentage	2.00%	3.00%	2.00%	3.00%
All other | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 10	$ 20	$ 26	$ 40
Sales percentage	0.00%	1.00%	1.00%	1.00%
All other | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 110	$ 130	$ 197	$ 302
Sales percentage	10.00%	11.00%	9.00%	12.00%
All other | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 59	$ 79	$ 128	$ 152
Sales percentage	3.00%	3.00%	3.00%	3.00%
All other | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 4	$ 1	$ 7	$ 3
Sales percentage	0.00%	0.00%	0.00%	0.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 58	$ 45	$ 123	$ 89
Intersegment sales | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	174	195	373	380
Intersegment sales | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	259	254	505	491
Intersegment sales | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	31	31	62	70
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,534	$ 2,913	$ 5,237	$ 5,903
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 1,294	$ 1,427	$ 2,577	$ 2,989
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,516	$ 2,588	$ 5,013	$ 5,177
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,979	$ 2,748	$ 5,834	$ 5,269
Sales percentage	100.00%	100.00%	100.00%	100.00%