Segment Information (Unaudited) Reconciliation to Consolidated Operating Income (Details 1) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	$ 10,423		$ 9,996	$ 30,242	$ 30,347
Total operating costs and expenses	9,181		8,876	27,233	27,066
Operating income	1,242		1,120	3,240	3,281
Interest and Debt Expense	(161)		(161)	(490)	(461)
Non-operating FAS pension benefit	136		168	403	503
Other, net	106		61	175	142
Earnings before income taxes	1,323		1,188	3,328	3,465
Gain (Loss) on Disposition of Business	0	$ 231	0	231	0
Unallowable State Taxes and Transactions Costs from Divestiture		$ (19)
Product [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	8,369		7,939	24,148	24,117
Service [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	2,054		2,057	6,094	6,230
Operating Segments [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Operating income	1,277		1,146	3,064	3,351
Operating Segments [Member] | Aeronautics Systems [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	3,142		2,961	9,070	9,065
Operating income	305		309	443	927
Operating Segments [Member] | Aeronautics Systems [Member] | Product [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	2,108		1,956	6,575	6,043
Operating Segments [Member] | Aeronautics Systems [Member] | Service [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	690		666	1,940	2,007
Operating Segments [Member] | Aeronautics Systems [Member] | Intersegment Costs [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	39		30	112	88
Operating Segments [Member] | Defense Systems [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	2,059		1,800	5,855	5,396
Operating income	234		160	666	507
Operating Segments [Member] | Defense Systems [Member] | Product [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	1,483		1,269	4,117	3,764
Operating Segments [Member] | Defense Systems [Member] | Service [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	297		333	940	1,011
Operating Segments [Member] | Defense Systems [Member] | Intersegment Costs [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	45		38	132	114
Operating Segments [Member] | Mission Systems [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	3,093		2,823	9,057	8,255
Operating income	515		390	1,317	1,129
Operating Segments [Member] | Mission Systems [Member] | Product [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	1,825		1,747	5,500	5,037
Operating Segments [Member] | Mission Systems [Member] | Service [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	466		451	1,383	1,372
Operating Segments [Member] | Mission Systems [Member] | Intersegment Costs [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	287		235	857	717
Operating Segments [Member] | Space Systems [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	2,698		2,870	7,912	9,021
Operating income	298		345	861	979
Operating Segments [Member] | Space Systems [Member] | Product [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	1,980		2,077	5,702	6,706
Operating Segments [Member] | Space Systems [Member] | Service [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	297		351	1,021	1,056
Operating Segments [Member] | Space Systems [Member] | Intersegment Costs [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	123		97	328	280
Intersegment OM
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Operating income	75		58	223	191
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	(102)		(46)	(17)	(102)
FAS/CAS operating adjustment	$ 67		$ 20	$ 193	$ 32