Segment Information (Unaudited) Reconciliation to Consolidated Operating Income (Details 1) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	$ 9,468	$ 10,133
Total operating costs and expenses	8,895	9,062
Operating income	573	1,071
Interest and Debt Expense	(156)	(146)
Non-operating FAS pension benefit	130	168
Other, net	31	38
Earnings before income taxes	578	1,131
Product [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	7,521	8,102
Service [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	1,947	2,031
Operating Segments [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Operating income	568	1,104
Operating Segments [Member] | Aeronautics Systems [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	2,814	3,044
Operating income	(183)	306
Operating Segments [Member] | Aeronautics Systems [Member] | Product [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	2,358	2,059
Operating Segments [Member] | Aeronautics Systems [Member] | Service [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	601	649
Operating Segments [Member] | Aeronautics Systems [Member] | Intersegment Costs [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	38	30
Operating Segments [Member] | Defense Systems [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	1,805	1,737
Operating income	179	156
Operating Segments [Member] | Defense Systems [Member] | Product [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	1,262	1,200
Operating Segments [Member] | Defense Systems [Member] | Service [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	324	345
Operating Segments [Member] | Defense Systems [Member] | Intersegment Costs [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	40	36
Operating Segments [Member] | Mission Systems [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	2,807	2,659
Operating income	361	378
Operating Segments [Member] | Mission Systems [Member] | Product [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	1,730	1,605
Operating Segments [Member] | Mission Systems [Member] | Service [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	434	446
Operating Segments [Member] | Mission Systems [Member] | Intersegment Costs [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	282	230
Operating Segments [Member] | Space Systems [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenues	2,568	3,149
Operating income	283	330
Operating Segments [Member] | Space Systems [Member] | Product [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	1,829	2,375
Operating Segments [Member] | Space Systems [Member] | Service [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	362	350
Operating Segments [Member] | Space Systems [Member] | Intersegment Costs [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	94	94
Intersegment OM
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Operating income	72	66
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Total operating costs and expenses	(58)	(39)
FAS/CAS operating adjustment	$ 63	$ 6