Segment Information (Unaudited) Sales by Contract Type (Details 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue, Contract Type [Line Items]
Sales	$ 8,971	$ 8,720	$ 26,569	$ 27,028
Sales percentage	100.00%	100.00%	100.00%	100.00%
Cost-type [Member]
Revenue, Contract Type [Line Items]
Sales	$ 4,624	$ 4,468	$ 13,615	$ 13,705
Sales percentage	52.00%	51.00%	51.00%	51.00%
Cost-type [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,185	$ 1,358	$ 3,678	$ 4,110
Sales percentage	48.00%	51.00%	48.00%	48.00%
Cost-type [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 366	$ 433	$ 1,075	$ 1,376
Sales percentage	32.00%	36.00%	32.00%	36.00%
Cost-type [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 881	$ 746	$ 2,591	$ 2,419
Sales percentage	40.00%	34.00%	39.00%	35.00%
Cost-type [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,192	$ 1,931	$ 6,271	$ 5,800
Sales percentage	70.00%	73.00%	70.00%	74.00%
Fixed-price [Member]
Revenue, Contract Type [Line Items]
Sales	$ 4,347	$ 4,252	$ 12,954	$ 13,323
Sales percentage	48.00%	49.00%	49.00%	49.00%
Fixed-price [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,294	$ 1,319	$ 3,915	$ 4,381
Sales percentage	52.00%	49.00%	52.00%	52.00%
Fixed-price [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 785	$ 770	$ 2,280	$ 2,436
Sales percentage	68.00%	64.00%	68.00%	64.00%
Fixed-price [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,325	$ 1,446	$ 4,123	$ 4,459
Sales percentage	60.00%	66.00%	61.00%	65.00%
Fixed-price [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 943	$ 717	$ 2,636	$ 2,047
Sales percentage	30.00%	27.00%	30.00%	26.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 58	$ 48	$ 181	$ 137
Intersegment sales | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	194	206	567	586
Intersegment sales | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	250	244	755	735
Intersegment sales | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	28	33	90	103
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,537	$ 2,725	$ 7,774	$ 8,628
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,345	$ 1,409	$ 3,922	$ 4,398
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,456	$ 2,436	$ 7,469	$ 7,613
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 3,163	$ 2,681	$ 8,997	$ 7,950
Sales percentage	100.00%	100.00%	100.00%	100.00%