Segment Information (Unaudited) Sales by Geographic Location (Details 4) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenue, Geographic Location [Line Items]
Revenues	$ 9,468	$ 10,133
United States
Revenue, Geographic Location [Line Items]
Revenues	$ 8,182	$ 8,971
Sales percentage	86.00%	88.00%
Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 417	$ 359
Sales percentage	4.00%	4.00%
Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 704	$ 676
Sales percentage	8.00%	7.00%
All other
Revenue, Geographic Location [Line Items]
Revenues	$ 165	$ 127
Sales percentage	2.00%	1.00%
Aeronautics Systems [Member] | United States
Revenue, Geographic Location [Line Items]
Revenues	$ 2,295	$ 2,588
Sales percentage	83.00%	86.00%
Aeronautics Systems [Member] | Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 200	$ 170
Sales percentage	7.00%	6.00%
Aeronautics Systems [Member] | Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 269	$ 247
Sales percentage	10.00%	8.00%
Aeronautics Systems [Member] | All other
Revenue, Geographic Location [Line Items]
Revenues	$ 9	$ 7
Sales percentage	0.00%	0.00%
Aeronautics Systems [Member] | Intersegment sales
Revenue, Geographic Location [Line Items]
Revenues	$ 41	$ 32
Aeronautics Systems [Member] | Operating Segments [Member]
Revenue, Geographic Location [Line Items]
Revenues	2,814	3,044
Defense Systems [Member] | United States
Revenue, Geographic Location [Line Items]
Revenues	$ 1,471	$ 1,476
Sales percentage	84.00%	87.00%
Defense Systems [Member] | Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 81	$ 50
Sales percentage	5.00%	3.00%
Defense Systems [Member] | Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 170	$ 132
Sales percentage	9.00%	8.00%
Defense Systems [Member] | All other
Revenue, Geographic Location [Line Items]
Revenues	$ 38	$ 37
Sales percentage	2.00%	2.00%
Defense Systems [Member] | Intersegment sales
Revenue, Geographic Location [Line Items]
Revenues	$ 45	$ 42
Defense Systems [Member] | Operating Segments [Member]
Revenue, Geographic Location [Line Items]
Revenues	1,805	1,737
Mission Systems [Member] | United States
Revenue, Geographic Location [Line Items]
Revenues	$ 1,997	$ 1,928
Sales percentage	81.00%	81.00%
Mission Systems [Member] | Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 128	$ 126
Sales percentage	5.00%	5.00%
Mission Systems [Member] | Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 239	$ 255
Sales percentage	10.00%	11.00%
Mission Systems [Member] | All other
Revenue, Geographic Location [Line Items]
Revenues	$ 108	$ 73
Sales percentage	4.00%	3.00%
Mission Systems [Member] | Intersegment sales
Revenue, Geographic Location [Line Items]
Revenues	$ 335	$ 277
Mission Systems [Member] | Operating Segments [Member]
Revenue, Geographic Location [Line Items]
Revenues	2,807	2,659
Space Systems [Member] | United States
Revenue, Geographic Location [Line Items]
Revenues	$ 2,419	$ 2,979
Sales percentage	98.00%	98.00%
Space Systems [Member] | Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 8	$ 13
Sales percentage	0.00%	0.00%
Space Systems [Member] | Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 26	$ 42
Sales percentage	2.00%	2.00%
Space Systems [Member] | All other
Revenue, Geographic Location [Line Items]
Revenues	$ 10	$ 10
Sales percentage	0.00%	0.00%
Space Systems [Member] | Intersegment sales
Revenue, Geographic Location [Line Items]
Revenues	$ 105	$ 105
Space Systems [Member] | Operating Segments [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 2,568	$ 3,149