Segment Information (Unaudited) Sales by Geographic Location (Details 4) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue, Geographic Location [Line Items]
Revenues	$ 10,218	$ 9,576	$ 20,351	$ 18,877
Sales percentage	100.00%	100.00%	100.00%	100.00%
United States
Revenue, Geographic Location [Line Items]
Revenues	$ 9,033	$ 8,374	$ 18,004	$ 16,509
Sales percentage	88.00%	88.00%	88.00%	88.00%
United States | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 2,541	$ 2,223	$ 5,070	$ 4,342
Sales percentage	88.00%	88.00%	87.00%	87.00%
United States | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 951	$ 868	$ 1,902	$ 1,687
Sales percentage	74.00%	71.00%	76.00%	70.00%
United States | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 2,049	$ 1,904	$ 3,977	$ 3,854
Sales percentage	83.00%	81.00%	82.00%	82.00%
United States | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 3,492	$ 3,379	$ 7,055	$ 6,626
Sales percentage	98.00%	97.00%	98.00%	98.00%
Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 377	$ 397	$ 736	$ 773
Sales percentage	4.00%	4.00%	4.00%	4.00%
Asia/Pacific | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 151	$ 138	$ 300	$ 285
Sales percentage	5.00%	5.00%	5.00%	6.00%
Asia/Pacific | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 93	$ 114	$ 164	$ 231
Sales percentage	7.00%	9.00%	7.00%	9.00%
Asia/Pacific | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 122	$ 120	$ 248	$ 212
Sales percentage	5.00%	5.00%	5.00%	5.00%
Asia/Pacific | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 11	$ 25	$ 24	$ 45
Sales percentage	1.00%	1.00%	1.00%	1.00%
Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 667	$ 601	$ 1,343	$ 1,148
Sales percentage	7.00%	6.00%	7.00%	6.00%
Europe | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 204	$ 165	$ 429	$ 339
Sales percentage	7.00%	7.00%	8.00%	7.00%
Europe | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 203	$ 132	$ 357	$ 260
Sales percentage	16.00%	11.00%	14.00%	11.00%
Europe | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 226	$ 266	$ 481	$ 466
Sales percentage	9.00%	11.00%	10.00%	10.00%
Europe | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 34	$ 38	$ 76	$ 83
Sales percentage	1.00%	1.00%	1.00%	1.00%
All other
Revenue, Geographic Location [Line Items]
Revenues	$ 141	$ 204	$ 268	$ 447
Sales percentage	1.00%	2.00%	1.00%	2.00%
All other | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 8	$ 5	$ 15	$ 15
Sales percentage	0.00%	0.00%	0.00%	0.00%
All other | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 43	$ 111	$ 80	$ 254
Sales percentage	3.00%	9.00%	3.00%	10.00%
All other | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 79	$ 68	$ 152	$ 152
Sales percentage	3.00%	3.00%	3.00%	3.00%
All other | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 11	$ 20	$ 21	$ 26
Sales percentage	0.00%	1.00%	0.00%	0.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 59	$ 64	$ 118	$ 129
Intersegment sales | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	223	195	422	364
Intersegment sales | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	297	283	574	520
Intersegment sales | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	25	26	52	58
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 2,963	$ 2,595	$ 5,932	$ 5,110
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 1,513	$ 1,420	$ 2,925	$ 2,796
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 2,773	$ 2,641	$ 5,432	$ 5,204
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 3,573	$ 3,488	$ 7,228	$ 6,838
Sales percentage	100.00%	100.00%	100.00%	100.00%