Segment Information Sales by Customer Type (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue, Major Customer [Line Items]
Sales	$ 41,954	$ 41,033	$ 39,290
US Government
Revenue, Major Customer [Line Items]
Sales	$ 35,183	$ 35,436	$ 33,882
Sales percentage	84.00%	87.00%	86.00%
International
Revenue, Major Customer [Line Items]
Sales	$ 5,990	$ 5,000	$ 4,905
Sales percentage	14.00%	12.00%	13.00%
Other Customers
Revenue, Major Customer [Line Items]
Sales	$ 781	$ 597	$ 503
Sales percentage	2.00%	1.00%	1.00%
Intersegment Sales
Revenue, Major Customer [Line Items]
Sales	$ 2,317	$ 1,892	$ 1,827
Aeronautics Systems | US Government
Revenue, Major Customer [Line Items]
Sales	$ 10,469	$ 10,364	$ 9,379
Sales percentage	82.00%	85.00%	85.00%
Aeronautics Systems | International
Revenue, Major Customer [Line Items]
Sales	$ 2,325	$ 1,878	$ 1,611
Sales percentage	18.00%	15.00%	15.00%
Aeronautics Systems | Other Customers
Revenue, Major Customer [Line Items]
Sales	$ 31	$ 22	$ 35
Sales percentage	0.00%	0.00%	0.00%
Aeronautics Systems | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Sales	$ 12,992	$ 12,396	$ 11,164
Aeronautics Systems | Intersegment Sales
Revenue, Major Customer [Line Items]
Sales	167	132	139
Defense Systems | US Government
Revenue, Major Customer [Line Items]
Sales	$ 6,377	$ 6,056	$ 5,699
Sales percentage	82.00%	84.00%	81.00%
Defense Systems | International
Revenue, Major Customer [Line Items]
Sales	$ 1,337	$ 1,101	$ 1,259
Sales percentage	17.00%	15.00%	18.00%
Defense Systems | Other Customers
Revenue, Major Customer [Line Items]
Sales	$ 78	$ 71	$ 76
Sales percentage	1.00%	1.00%	1.00%
Defense Systems | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Sales	$ 8,002	$ 7,399	$ 7,185
Defense Systems | Intersegment Sales
Revenue, Major Customer [Line Items]
Sales	210	171	151
Mission Systems [Member] | US Government
Revenue, Major Customer [Line Items]
Sales	$ 8,827	$ 8,322	$ 7,999
Sales percentage	80.00%	81.00%	81.00%
Mission Systems [Member] | International
Revenue, Major Customer [Line Items]
Sales	$ 2,125	$ 1,809	$ 1,757
Sales percentage	19.00%	18.00%	18.00%
Mission Systems [Member] | Other Customers
Revenue, Major Customer [Line Items]
Sales	$ 120	$ 91	$ 85
Sales percentage	1.00%	1.00%	1.00%
Mission Systems [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Sales	$ 12,506	$ 11,399	$ 10,895
Mission Systems [Member] | Intersegment Sales
Revenue, Major Customer [Line Items]
Sales	1,434	1,177	1,054
Space Systems | US Government
Revenue, Major Customer [Line Items]
Sales	$ 9,510	$ 10,694	$ 10,805
Sales percentage	93.00%	94.00%	95.00%
Space Systems | International
Revenue, Major Customer [Line Items]
Sales	$ 203	$ 212	$ 278
Sales percentage	2.00%	2.00%	2.00%
Space Systems | Other Customers
Revenue, Major Customer [Line Items]
Sales	$ 552	$ 413	$ 307
Sales percentage	5.00%	4.00%	3.00%
Space Systems | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Sales	$ 10,771	$ 11,731	$ 11,873
Space Systems | Intersegment Sales
Revenue, Major Customer [Line Items]
Sales	$ 506	$ 412	$ 483