Segment Information (Unaudited) Sales by Contract Type (Details 3) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue, Contract Type [Line Items]
Sales	$ 9,576	$ 8,801	$ 18,877	$ 17,598
Sales percentage	100.00%	100.00%	100.00%	100.00%
Cost-type [Member]
Revenue, Contract Type [Line Items]
Sales	$ 5,252	$ 4,561	$ 10,313	$ 8,991
Sales percentage	55.00%	52.00%	55.00%	51.00%
Cost-type [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,319	$ 1,217	$ 2,550	$ 2,493
Sales percentage	52.00%	49.00%	51.00%	49.00%
Cost-type [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 404	$ 373	$ 827	$ 709
Sales percentage	33.00%	33.00%	34.00%	32.00%
Cost-type [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 957	$ 875	$ 1,918	$ 1,710
Sales percentage	41.00%	39.00%	41.00%	38.00%
Cost-type [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,572	$ 2,096	$ 5,018	$ 4,079
Sales percentage	74.00%	71.00%	74.00%	71.00%
Fixed-price [Member]
Revenue, Contract Type [Line Items]
Sales	$ 4,324	$ 4,240	$ 8,564	$ 8,607
Sales percentage	45.00%	48.00%	45.00%	49.00%
Fixed-price [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,212	$ 1,259	$ 2,431	$ 2,621
Sales percentage	48.00%	51.00%	49.00%	51.00%
Fixed-price [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 821	$ 747	$ 1,605	$ 1,495
Sales percentage	67.00%	67.00%	66.00%	68.00%
Fixed-price [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,401	$ 1,382	$ 2,766	$ 2,798
Sales percentage	59.00%	61.00%	59.00%	62.00%
Fixed-price [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 890	$ 852	$ 1,762	$ 1,693
Sales percentage	26.00%	29.00%	26.00%	29.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 64	$ 58	$ 129	$ 123
Intersegment sales | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	195	174	364	373
Intersegment sales | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	283	259	520	505
Intersegment sales | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	26	31	58	62
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,595	$ 2,534	$ 5,110	$ 5,237
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,420	$ 1,294	$ 2,796	$ 2,577
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,641	$ 2,516	$ 5,204	$ 5,013
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 3,488	$ 2,979	$ 6,838	$ 5,834
Sales percentage	100.00%	100.00%	100.00%	100.00%