Information on Business Segments - Summary of Financial Information for Each Business Segment (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net sales
Net sales		$ 67,571	$ 65,984	$ 67,044
Operating profit
Operating profit		8,507	8,348	9,123
Unallocated items
Intangible asset amortization expense		(247)	(248)	(285)
Severance and other charges		92	100	36
Severance and restructuring costs, after-tax	$ 73	$ 73	$ 79	$ 28
Severance and restructuring costs, per share, after-tax (in dollars per share)	$ 0.30	$ 0.30	$ 0.31	$ 0.10
Operating Segments
Net sales
Net sales		$ 67,571	$ 65,984	$ 67,044
Operating profit
Operating profit		7,389	7,467	7,664
Unallocated items
Unallocated items
FAS/CAS pension operating adjustment		1,660	1,709	1,960
Intangible asset amortization expense		(247)	(248)	(285)
Severance and restructuring		(92)	(100)	(36)
Other, net		(203)	(480)	(180)
Total unallocated, net		1,118	881	1,459
Intersegment sales
Net sales
Net sales		3,474	3,187	3,092
Aeronautics
Net sales
Net sales		27,474	26,987	26,748
Aeronautics | Operating Segments
Net sales
Net sales		27,474	26,987	26,748
Operating profit
Operating profit		2,825	2,867	2,800
Aeronautics | Intersegment sales
Net sales
Net sales		303	249	219
Missiles and Fire Control
Net sales
Net sales		11,253	11,317	11,693
Missiles and Fire Control | Operating Segments
Net sales
Net sales		11,253	11,317	11,693
Operating profit
Operating profit		1,541	1,637	1,650
Missiles and Fire Control | Intersegment sales
Net sales
Net sales		688	627	618
Rotary and Mission Systems
Net sales
Net sales		16,239	16,148	16,789
Rotary and Mission Systems | Operating Segments
Net sales
Net sales		16,239	16,148	16,789
Operating profit
Operating profit		1,865	1,906	2,030
Rotary and Mission Systems | Intersegment sales
Net sales
Net sales		2,125	1,930	1,895
Space
Net sales
Net sales		12,605	11,532	11,814
Space | Operating Segments
Net sales
Net sales		12,605	11,532	11,814
Operating profit
Operating profit		1,158	1,057	1,184
Space | Intersegment sales
Net sales
Net sales		$ 358	$ 381	$ 360