Segment Information (Unaudited) Sales by Contract Type (Details 3) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue, Contract Type [Line Items]
Sales	$ 9,301	$ 8,797
Sales percentage	100.00%	100.00%
Cost-type [Member]
Revenue, Contract Type [Line Items]
Sales	$ 5,061	$ 4,430
Sales percentage	54.00%	50.00%
Cost-type [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,231	$ 1,276
Sales percentage	50.00%	48.00%
Cost-type [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 423	$ 336
Sales percentage	35.00%	31.00%
Cost-type [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 961	$ 835
Sales percentage	41.00%	37.00%
Cost-type [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,446	$ 1,983
Sales percentage	74.00%	70.00%
Fixed-price [Member]
Revenue, Contract Type [Line Items]
Sales	$ 4,240	$ 4,367
Sales percentage	46.00%	50.00%
Fixed-price [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,219	$ 1,362
Sales percentage	50.00%	52.00%
Fixed-price [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 784	$ 748
Sales percentage	65.00%	69.00%
Fixed-price [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,365	$ 1,416
Sales percentage	59.00%	63.00%
Fixed-price [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 872	$ 841
Sales percentage	26.00%	30.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 65	$ 65
Intersegment sales | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	169	199
Intersegment sales | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	237	246
Intersegment sales | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	32	31
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,515	$ 2,703
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 1,376	$ 1,283
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 2,563	$ 2,497
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Sales	$ 3,350	$ 2,855
Sales percentage	100.00%	100.00%