Segment Information (Unaudited) Sales by Customer Type (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue, Major Customer [Line Items]
Sales	$ 9,775	$ 8,971	$ 28,652	$ 26,569
Sales percentage	100.00%	100.00%	100.00%	100.00%
US Government
Revenue, Major Customer [Line Items]
Sales	$ 8,431	$ 7,654	$ 24,697	$ 22,731
Sales percentage	86.00%	86.00%	86.00%	86.00%
US Government | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,331	$ 2,138	$ 6,654	$ 6,564
Sales percentage	84.00%	85.00%	85.00%	85.00%
US Government | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 841	$ 820	$ 2,492	$ 2,369
Sales percentage	60.00%	62.00%	60.00%	61.00%
US Government | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 1,917	$ 1,729	$ 5,729	$ 5,325
Sales percentage	73.00%	71.00%	73.00%	72.00%
US Government | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 3,342	$ 2,967	$ 9,822	$ 8,473
Sales percentage	95.00%	94.00%	95.00%	94.00%
International(2)
Revenue, Major Customer [Line Items]
Sales	$ 1,239	$ 1,210	$ 3,607	$ 3,506
Sales percentage	13.00%	13.00%	13.00%	13.00%
International(2) | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 377	$ 341	$ 1,016	$ 1,012
Sales percentage	14.00%	13.00%	13.00%	13.00%
International(2) | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 358	$ 312	$ 1,103	$ 933
Sales percentage	25.00%	23.00%	26.00%	24.00%
International(2) | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 432	$ 452	$ 1,262	$ 1,300
Sales percentage	16.00%	18.00%	16.00%	17.00%
International(2) | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 72	$ 105	$ 226	$ 261
Sales percentage	2.00%	3.00%	2.00%	3.00%
Other Customers [Member]
Revenue, Major Customer [Line Items]
Sales	$ 105	$ 107	$ 348	$ 332
Sales percentage	1.00%	1.00%	1.00%	1.00%
Other Customers [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 4	$ 0	$ 23	$ 17
Sales percentage	0.00%	0.00%	0.00%	0.00%
Other Customers [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 19	$ 19	$ 55	$ 53
Sales percentage	1.00%	1.00%	1.00%	1.00%
Other Customers [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 16	$ 25	$ 58	$ 89
Sales percentage	1.00%	1.00%	1.00%	1.00%
Other Customers [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 66	$ 63	$ 212	$ 173
Sales percentage	2.00%	2.00%	2.00%	2.00%
Intersegment Sales [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 54	$ 58	$ 183	$ 181
Sales percentage	2.00%	2.00%	2.00%	2.00%
Intersegment Sales [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 203	$ 194	$ 567	$ 567
Sales percentage	14.00%	14.00%	13.00%	14.00%
Intersegment Sales [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 263	$ 250	$ 783	$ 755
Sales percentage	10.00%	10.00%	10.00%	10.00%
Intersegment Sales [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 26	$ 28	$ 84	$ 90
Sales percentage	1.00%	1.00%	1.00%	1.00%
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,766	$ 2,537	$ 7,876	$ 7,774
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 1,421	$ 1,345	$ 4,217	$ 3,922
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,628	$ 2,456	$ 7,832	$ 7,469
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 3,506	$ 3,163	$ 10,344	$ 8,997
Sales percentage	100.00%	100.00%	100.00%	100.00%