Segment Information (Unaudited) Sales by Geographic Location (Details 4) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue, Geographic Location [Line Items]
Sales	$ 9,576	$ 8,801	$ 18,877	$ 17,598
Sales percentage	100.00%	100.00%	100.00%	100.00%
United States
Revenue, Geographic Location [Line Items]
Sales	$ 8,374	$ 7,646	$ 16,509	$ 15,302
Sales percentage	88.00%	87.00%	88.00%	87.00%
United States | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,223	$ 2,148	$ 4,342	$ 4,443
Sales percentage	88.00%	87.00%	87.00%	86.00%
United States | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 868	$ 792	$ 1,687	$ 1,583
Sales percentage	71.00%	71.00%	70.00%	72.00%
United States | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 1,904	$ 1,842	$ 3,854	$ 3,660
Sales percentage	81.00%	81.00%	82.00%	81.00%
United States | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 3,379	$ 2,864	$ 6,626	$ 5,616
Sales percentage	97.00%	97.00%	98.00%	97.00%
Asia/Pacific
Revenue, Geographic Location [Line Items]
Sales	$ 397	$ 489	$ 773	$ 952
Sales percentage	4.00%	6.00%	4.00%	5.00%
Asia/Pacific | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 138	$ 205	$ 285	$ 395
Sales percentage	5.00%	8.00%	6.00%	8.00%
Asia/Pacific | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 114	$ 123	$ 231	$ 228
Sales percentage	9.00%	11.00%	9.00%	10.00%
Asia/Pacific | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 120	$ 137	$ 212	$ 276
Sales percentage	5.00%	6.00%	5.00%	6.00%
Asia/Pacific | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 25	$ 24	$ 45	$ 53
Sales percentage	1.00%	1.00%	1.00%	1.00%
Europe
Revenue, Geographic Location [Line Items]
Sales	$ 601	$ 483	$ 1,148	$ 986
Sales percentage	6.00%	5.00%	6.00%	6.00%
Europe | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 165	$ 113	$ 339	$ 250
Sales percentage	7.00%	5.00%	7.00%	5.00%
Europe | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 132	$ 95	$ 260	$ 196
Sales percentage	11.00%	8.00%	11.00%	9.00%
Europe | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 266	$ 219	$ 466	$ 444
Sales percentage	11.00%	10.00%	10.00%	10.00%
Europe | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 38	$ 56	$ 83	$ 96
Sales percentage	1.00%	2.00%	1.00%	2.00%
All other
Revenue, Geographic Location [Line Items]
Sales	$ 204	$ 183	$ 447	$ 358
Sales percentage	2.00%	2.00%	2.00%	2.00%
All other | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 5	$ 10	$ 15	$ 26
Sales percentage	0.00%	0.00%	0.00%	1.00%
All other | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 111	$ 110	$ 254	$ 197
Sales percentage	9.00%	10.00%	10.00%	9.00%
All other | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 68	$ 59	$ 152	$ 128
Sales percentage	3.00%	3.00%	3.00%	3.00%
All other | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 20	$ 4	$ 26	$ 7
Sales percentage	1.00%	0.00%	0.00%	0.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 64	$ 58	$ 129	$ 123
Intersegment sales | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	195	174	364	373
Intersegment sales | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	283	259	520	505
Intersegment sales | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	26	31	58	62
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,595	$ 2,534	$ 5,110	$ 5,237
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 1,420	$ 1,294	$ 2,796	$ 2,577
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,641	$ 2,516	$ 5,204	$ 5,013
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 3,488	$ 2,979	$ 6,838	$ 5,834
Sales percentage	100.00%	100.00%	100.00%	100.00%