Segment Information Reconciliation to Consolidated Operating Income (Details 1) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Sales		$ 41,954	$ 41,033	$ 39,290
Total operating costs and expenses		37,674	36,663	36,753
Operating income		4,511	4,370	2,537
Unallowable State Taxes and Transactions Costs from Divestiture	$ (19)
Product [Member]
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Sales		33,741	32,726	30,897
Service [Member]
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Sales		8,213	8,307	8,393
Operating Segments
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Operating income		4,377	4,544	2,760
Operating Segments | Aeronautics Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Sales		12,992	12,396	11,164
Operating income		813	1,236	(416)
Operating Segments | Defense Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Sales		8,002	7,399	7,185
Operating income		871	716	684
Operating Segments | Mission Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Sales		12,506	11,399	10,895
Operating income		1,827	1,598	1,609
Operating Segments | Space Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Sales		10,771	11,731	11,873
Operating income		1,183	1,254	1,130
Operating Segments | Product [Member] | Aeronautics Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total operating costs and expenses		9,340	8,383	9,053
Operating Segments | Product [Member] | Defense Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total operating costs and expenses		5,682	5,169	4,708
Operating Segments | Product [Member] | Mission Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total operating costs and expenses		7,608	7,000	6,669
Operating Segments | Product [Member] | Space Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total operating costs and expenses		7,827	8,711	8,844
Operating Segments | Service [Member] | Aeronautics Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total operating costs and expenses		2,687	2,658	2,399
Operating Segments | Service [Member] | Defense Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total operating costs and expenses		1,263	1,365	1,659
Operating Segments | Service [Member] | Mission Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total operating costs and expenses		1,861	1,805	1,730
Operating Segments | Service [Member] | Space Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total operating costs and expenses		1,309	1,398	1,468
Operating Segments | Intersegment Costs [Member] | Aeronautics Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total operating costs and expenses		152	119	128
Operating Segments | Intersegment Costs [Member] | Defense Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total operating costs and expenses		186	149	134
Operating Segments | Intersegment Costs [Member] | Mission Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total operating costs and expenses		1,210	996	887
Operating Segments | Intersegment Costs [Member] | Space Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Total operating costs and expenses		452	368	431
Intersegment OM
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Sales		2,317	1,892	1,827
Operating income		317	260	247
Intersegment OM | Aeronautics Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Sales		167	132	139
Operating income		15	13	11
Intersegment OM | Defense Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Sales		210	171	151
Operating income		24	22	17
Intersegment OM | Mission Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Sales		1,434	1,177	1,054
Operating income		224	181	167
Intersegment OM | Space Systems
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Sales		506	412	483
Operating income		54	44	52
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
FAS/CAS Operating Adjustment		258	40	(82)
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Sales and Service Revenues by Segment (Table Amounts) [Abstract]
Operating income		$ (124)	$ (214)	$ (141)