Segment Information (Unaudited) Sales by Geographic Location (Details 4) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue, Geographic Location [Line Items]
Sales	$ 9,301	$ 8,797
Sales percentage	100.00%	100.00%
United States
Revenue, Geographic Location [Line Items]
Sales	$ 8,135	$ 7,656
Sales percentage	87.00%	87.00%
United States | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,119	$ 2,295
Sales percentage	87.00%	87.00%
United States | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 819	$ 791
Sales percentage	67.00%	73.00%
United States | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 1,950	$ 1,818
Sales percentage	83.00%	81.00%
United States | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 3,247	$ 2,752
Sales percentage	98.00%	98.00%
Asia/Pacific
Revenue, Geographic Location [Line Items]
Sales	$ 376	$ 463
Sales percentage	4.00%	5.00%
Asia/Pacific | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 147	$ 190
Sales percentage	6.00%	7.00%
Asia/Pacific | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 117	$ 105
Sales percentage	10.00%	10.00%
Asia/Pacific | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 92	$ 139
Sales percentage	4.00%	6.00%
Asia/Pacific | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 20	$ 29
Sales percentage	1.00%	1.00%
Europe
Revenue, Geographic Location [Line Items]
Sales	$ 547	$ 503
Sales percentage	6.00%	6.00%
Europe | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 174	$ 137
Sales percentage	7.00%	5.00%
Europe | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 128	$ 101
Sales percentage	11.00%	9.00%
Europe | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 200	$ 225
Sales percentage	9.00%	10.00%
Europe | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 45	$ 40
Sales percentage	1.00%	1.00%
All other
Revenue, Geographic Location [Line Items]
Sales	$ 243	$ 175
Sales percentage	3.00%	2.00%
All other | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 10	$ 16
Sales percentage	0.00%	1.00%
All other | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 143	$ 87
Sales percentage	12.00%	8.00%
All other | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 84	$ 69
Sales percentage	4.00%	3.00%
All other | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 6	$ 3
Sales percentage	0.00%	0.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 65	$ 65
Intersegment sales | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	169	199
Intersegment sales | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	237	246
Intersegment sales | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	32	31
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,515	$ 2,703
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 1,376	$ 1,283
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 2,563	$ 2,497
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Sales	$ 3,350	$ 2,855
Sales percentage	100.00%	100.00%