Segment Information (Unaudited) Sales by Geographic Location (Details 4) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue, Geographic Location [Line Items]
Revenues	$ 10,133	$ 9,301
Sales percentage	100.00%	100.00%
United States
Revenue, Geographic Location [Line Items]
Revenues	$ 8,971	$ 8,135
Sales percentage	88.00%	87.00%
United States | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 2,529	$ 2,119
Sales percentage	87.00%	87.00%
United States | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 951	$ 819
Sales percentage	78.00%	67.00%
United States | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 1,928	$ 1,950
Sales percentage	81.00%	83.00%
United States | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 3,563	$ 3,247
Sales percentage	98.00%	98.00%
Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 359	$ 376
Sales percentage	4.00%	4.00%
Asia/Pacific | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 149	$ 147
Sales percentage	5.00%	6.00%
Asia/Pacific | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 71	$ 117
Sales percentage	6.00%	10.00%
Asia/Pacific | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 126	$ 92
Sales percentage	5.00%	4.00%
Asia/Pacific | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 13	$ 20
Sales percentage	1.00%	1.00%
Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 676	$ 547
Sales percentage	7.00%	6.00%
Europe | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 225	$ 174
Sales percentage	8.00%	7.00%
Europe | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 154	$ 128
Sales percentage	13.00%	11.00%
Europe | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 255	$ 200
Sales percentage	11.00%	9.00%
Europe | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 42	$ 45
Sales percentage	1.00%	1.00%
All other
Revenue, Geographic Location [Line Items]
Revenues	$ 127	$ 243
Sales percentage	1.00%	3.00%
All other | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 7	$ 10
Sales percentage	0.00%	0.00%
All other | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 37	$ 143
Sales percentage	3.00%	12.00%
All other | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 73	$ 84
Sales percentage	3.00%	4.00%
All other | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 10	$ 6
Sales percentage	0.00%	0.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 59	$ 65
Intersegment sales | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	199	169
Intersegment sales | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	277	237
Intersegment sales | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	27	32
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 2,969	$ 2,515
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 1,412	$ 1,376
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 2,659	$ 2,563
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 3,655	$ 3,350
Sales percentage	100.00%	100.00%