Segment Information (Unaudited) Sales by Contract Type (Details 3) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue, Contract Type [Line Items]
Revenues	$ 10,133	$ 9,301
Sales percentage	100.00%	100.00%
Cost-type [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 5,197	$ 5,061
Sales percentage	51.00%	54.00%
Cost-type [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,313	$ 1,231
Sales percentage	45.00%	50.00%
Cost-type [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 360	$ 423
Sales percentage	30.00%	35.00%
Cost-type [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,067	$ 961
Sales percentage	45.00%	41.00%
Cost-type [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 2,457	$ 2,446
Sales percentage	68.00%	74.00%
Fixed-price [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 4,936	$ 4,240
Sales percentage	49.00%	46.00%
Fixed-price [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,597	$ 1,219
Sales percentage	55.00%	50.00%
Fixed-price [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 853	$ 784
Sales percentage	70.00%	65.00%
Fixed-price [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,315	$ 1,365
Sales percentage	55.00%	59.00%
Fixed-price [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,171	$ 872
Sales percentage	32.00%	26.00%
Intersegment sales | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 59	$ 65
Intersegment sales | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	199	169
Intersegment sales | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	277	237
Intersegment sales | Space Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	27	32
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 2,969	$ 2,515
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 1,412	$ 1,376
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 2,659	$ 2,563
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Contract Type [Line Items]
Revenues	$ 3,655	$ 3,350
Sales percentage	100.00%	100.00%