Segment Information (Unaudited) Sales by Geographic Location (Details 4) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Revenue, Geographic Location [Line Items]
Revenues	$ 9,881	$ 9,468
United States
Revenue, Geographic Location [Line Items]
Revenues	$ 8,600	$ 8,182
Sales percentage	87.00%	86.00%
Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 442	$ 417
Sales percentage	4.00%	4.00%
Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 686	$ 704
Sales percentage	7.00%	8.00%
All other
Revenue, Geographic Location [Line Items]
Revenues	$ 153	$ 165
Sales percentage	2.00%	2.00%
Aeronautics Systems [Member] | United States
Revenue, Geographic Location [Line Items]
Revenues	$ 2,709	$ 2,295
Sales percentage	83.00%	83.00%
Aeronautics Systems [Member] | Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 229	$ 200
Sales percentage	7.00%	7.00%
Aeronautics Systems [Member] | Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 289	$ 269
Sales percentage	9.00%	10.00%
Aeronautics Systems [Member] | All other
Revenue, Geographic Location [Line Items]
Revenues	$ 22	$ 9
Sales percentage	1.00%	0.00%
Aeronautics Systems [Member] | Intersegment sales
Revenue, Geographic Location [Line Items]
Revenues	$ 34	$ 41
Aeronautics Systems [Member] | Operating Segments [Member]
Revenue, Geographic Location [Line Items]
Revenues	3,283	2,814
Defense Systems [Member] | United States
Revenue, Geographic Location [Line Items]
Revenues	$ 1,612	$ 1,471
Sales percentage	87.00%	84.00%
Defense Systems [Member] | Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 81	$ 81
Sales percentage	4.00%	5.00%
Defense Systems [Member] | Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 125	$ 170
Sales percentage	7.00%	9.00%
Defense Systems [Member] | All other
Revenue, Geographic Location [Line Items]
Revenues	$ 29	$ 38
Sales percentage	2.00%	2.00%
Defense Systems [Member] | Intersegment sales
Revenue, Geographic Location [Line Items]
Revenues	$ 52	$ 45
Defense Systems [Member] | Operating Segments [Member]
Revenue, Geographic Location [Line Items]
Revenues	1,899	1,805
Mission Systems [Member] | United States
Revenue, Geographic Location [Line Items]
Revenues	$ 2,012	$ 1,997
Sales percentage	81.00%	81.00%
Mission Systems [Member] | Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 114	$ 128
Sales percentage	5.00%	5.00%
Mission Systems [Member] | Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 252	$ 239
Sales percentage	10.00%	10.00%
Mission Systems [Member] | All other
Revenue, Geographic Location [Line Items]
Revenues	$ 98	$ 108
Sales percentage	4.00%	4.00%
Mission Systems [Member] | Intersegment sales
Revenue, Geographic Location [Line Items]
Revenues	$ 385	$ 335
Mission Systems [Member] | Operating Segments [Member]
Revenue, Geographic Location [Line Items]
Revenues	2,861	2,807
Space Systems [Member] | United States
Revenue, Geographic Location [Line Items]
Revenues	$ 2,267	$ 2,419
Sales percentage	98.00%	98.00%
Space Systems [Member] | Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 18	$ 8
Sales percentage	1.00%	0.00%
Space Systems [Member] | Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 20	$ 26
Sales percentage	1.00%	2.00%
Space Systems [Member] | All other
Revenue, Geographic Location [Line Items]
Revenues	$ 4	$ 10
Sales percentage	0.00%	0.00%
Space Systems [Member] | Intersegment sales
Revenue, Geographic Location [Line Items]
Revenues	$ 171	$ 105
Space Systems [Member] | Operating Segments [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 2,480	$ 2,568