Segment Information (Unaudited) Sales by Contract Type (Details 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue, Contract Type [Line Items]
Sales	$ 9,775	$ 8,971	$ 28,652	$ 26,569
Sales percentage	100.00%	100.00%	100.00%	100.00%
Cost-type [Member]
Revenue, Contract Type [Line Items]
Sales	$ 5,261	$ 4,624	$ 15,574	$ 13,615
Sales percentage	54.00%	52.00%	54.00%	51.00%
Cost-type [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,370	$ 1,185	$ 3,920	$ 3,678
Sales percentage	51.00%	48.00%	51.00%	48.00%
Cost-type [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 378	$ 366	$ 1,205	$ 1,075
Sales percentage	31.00%	32.00%	33.00%	32.00%
Cost-type [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,002	$ 881	$ 2,920	$ 2,591
Sales percentage	42.00%	40.00%	41.00%	39.00%
Cost-type [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,511	$ 2,192	$ 7,529	$ 6,271
Sales percentage	72.00%	70.00%	73.00%	70.00%
Fixed-price [Member]
Revenue, Contract Type [Line Items]
Sales	$ 4,514	$ 4,347	$ 13,078	$ 12,954
Sales percentage	46.00%	48.00%	46.00%	49.00%
Fixed-price [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,342	$ 1,294	$ 3,773	$ 3,915
Sales percentage	49.00%	52.00%	49.00%	52.00%
Fixed-price [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 840	$ 785	$ 2,445	$ 2,280
Sales percentage	69.00%	68.00%	67.00%	68.00%
Fixed-price [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,363	$ 1,325	$ 4,129	$ 4,123
Sales percentage	58.00%	60.00%	59.00%	61.00%
Fixed-price [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 969	$ 943	$ 2,731	$ 2,636
Sales percentage	28.00%	30.00%	27.00%	30.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 54	$ 58	$ 183	$ 181
Intersegment sales | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	203	194	567	567
Intersegment sales | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	263	250	783	755
Intersegment sales | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	26	28	84	90
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,766	$ 2,537	$ 7,876	$ 7,774
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,421	$ 1,345	$ 4,217	$ 3,922
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,628	$ 2,456	$ 7,832	$ 7,469
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 3,506	$ 3,163	$ 10,344	$ 8,997
Sales percentage	100.00%	100.00%	100.00%	100.00%