Segment Information Sales by Contract Type (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue, Contract Type [Line Items]
Sales	$ 41,954	$ 41,033	$ 39,290
Fixed-price
Revenue, Contract Type [Line Items]
Sales	$ 21,010	$ 20,069	$ 18,311
Sales percentage	50.00%	49.00%	47.00%
Cost Reimbursable
Revenue, Contract Type [Line Items]
Sales	$ 20,944	$ 20,964	$ 20,979
Sales percentage	50.00%	51.00%	53.00%
Intersegment Sales
Revenue, Contract Type [Line Items]
Sales	$ 2,317	$ 1,892	$ 1,827
Aeronautics Systems | Fixed-price
Revenue, Contract Type [Line Items]
Sales	$ 6,982	$ 6,764	$ 5,667
Sales percentage	54.00%	55.00%	51.00%
Aeronautics Systems | Cost Reimbursable
Revenue, Contract Type [Line Items]
Sales	$ 5,843	$ 5,500	$ 5,358
Sales percentage	46.00%	45.00%	49.00%
Aeronautics Systems | Operating Segments [Member]
Revenue, Contract Type [Line Items]
Sales	$ 12,992	$ 12,396	$ 11,164
Aeronautics Systems | Intersegment Sales
Revenue, Contract Type [Line Items]
Sales	167	132	139
Defense Systems | Fixed-price
Revenue, Contract Type [Line Items]
Sales	$ 3,675	$ 3,353	$ 3,166
Sales percentage	47.00%	46.00%	45.00%
Defense Systems | Cost Reimbursable
Revenue, Contract Type [Line Items]
Sales	$ 4,117	$ 3,875	$ 3,868
Sales percentage	53.00%	54.00%	55.00%
Defense Systems | Operating Segments [Member]
Revenue, Contract Type [Line Items]
Sales	$ 8,002	$ 7,399	$ 7,185
Defense Systems | Intersegment Sales
Revenue, Contract Type [Line Items]
Sales	210	171	151
Mission Systems [Member] | Fixed-price
Revenue, Contract Type [Line Items]
Sales	$ 6,060	$ 5,633	$ 5,725
Sales percentage	55.00%	55.00%	58.00%
Mission Systems [Member] | Cost Reimbursable
Revenue, Contract Type [Line Items]
Sales	$ 5,012	$ 4,589	$ 4,116
Sales percentage	45.00%	45.00%	42.00%
Mission Systems [Member] | Operating Segments [Member]
Revenue, Contract Type [Line Items]
Sales	$ 12,506	$ 11,399	$ 10,895
Mission Systems [Member] | Intersegment Sales
Revenue, Contract Type [Line Items]
Sales	1,434	1,177	1,054
Space Systems | Fixed-price
Revenue, Contract Type [Line Items]
Sales	$ 4,293	$ 4,319	$ 3,753
Sales percentage	42.00%	38.00%	33.00%
Space Systems | Cost Reimbursable
Revenue, Contract Type [Line Items]
Sales	$ 5,972	$ 7,000	$ 7,637
Sales percentage	58.00%	62.00%	67.00%
Space Systems | Operating Segments [Member]
Revenue, Contract Type [Line Items]
Sales	$ 10,771	$ 11,731	$ 11,873
Space Systems | Intersegment Sales
Revenue, Contract Type [Line Items]
Sales	$ 506	$ 412	$ 483