Segment Information (Unaudited) Sales by Contract Type (Details 3) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue, Contract Type [Line Items]
Sales	$ 8,801	$ 9,151	$ 17,598	$ 18,308
Sales percentage	100.00%	100.00%	100.00%	100.00%
Cost-type [Member]
Revenue, Contract Type [Line Items]
Sales	$ 4,561	$ 4,608	$ 8,991	$ 9,237
Sales percentage	52.00%	50.00%	51.00%	50.00%
Cost-type [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,217	$ 1,341	$ 2,493	$ 2,752
Sales percentage	49.00%	47.00%	49.00%	47.00%
Cost-type [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 373	$ 434	$ 709	$ 943
Sales percentage	33.00%	35.00%	32.00%	36.00%
Cost-type [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 875	$ 808	$ 1,710	$ 1,673
Sales percentage	39.00%	35.00%	38.00%	36.00%
Cost-type [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,096	$ 2,025	$ 4,079	$ 3,869
Sales percentage	71.00%	75.00%	71.00%	74.00%
Fixed-price [Member]
Revenue, Contract Type [Line Items]
Sales	$ 4,240	$ 4,543	$ 8,607	$ 9,071
Sales percentage	48.00%	50.00%	49.00%	50.00%
Fixed-price [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,259	$ 1,527	$ 2,621	$ 3,062
Sales percentage	51.00%	53.00%	51.00%	53.00%
Fixed-price [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 747	$ 798	$ 1,495	$ 1,666
Sales percentage	67.00%	65.00%	68.00%	64.00%
Fixed-price [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,382	$ 1,526	$ 2,798	$ 3,013
Sales percentage	61.00%	65.00%	62.00%	64.00%
Fixed-price [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 852	$ 692	$ 1,693	$ 1,330
Sales percentage	29.00%	25.00%	29.00%	26.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 58	$ 45	$ 123	$ 89
Intersegment sales | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	174	195	373	380
Intersegment sales | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	259	254	505	491
Intersegment sales | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	31	31	62	70
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,534	$ 2,913	$ 5,237	$ 5,903
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,294	$ 1,427	$ 2,577	$ 2,989
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,516	$ 2,588	$ 5,013	$ 5,177
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,979	$ 2,748	$ 5,834	$ 5,269
Sales percentage	100.00%	100.00%	100.00%	100.00%