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
	Jun. 28, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net sales
Net sales		$ 67,044	$ 65,398	$ 59,812
Operating profit
Operating profit		9,123	8,644	8,545
Unallocated items
Severance and restructuring charges		36	27	0
Severance and restructuring costs, after-tax		$ 28	$ 21
Severance and restructuring costs, per share, after-tax (in dollars per share)		$ 0.10	$ 0.08
Equity method investee impairment		$ 0	$ 128	0
Gain on property sale		0	0	51
Net gain on divestiture of business segment		0	(55)	0
Land
Unallocated items
Gain on property sale				51
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Distributed Energy Solutions
Unallocated items
Net gain on divestiture of business segment				34
AMMROC
Unallocated items
Equity method investee impairment	$ 128
Equity method investment impairment, after tax	$ 96
Operating Segments
Net sales
Net sales		67,044	65,398	59,812
Operating profit
Operating profit		7,379	7,152	6,574
Segment Reconciling Items
Unallocated items
FAS/CAS operating adjustment		1,960	1,876	2,049
Stock-based compensation		(227)	(221)	(189)
Severance and restructuring Charges		(36)	(27)	0
Other, net		47	(136)	111
Total unallocated, net		1,744	1,492	1,971
Aeronautics
Net sales
Net sales		26,748	26,266	23,693
Aeronautics | Operating Segments
Net sales
Net sales		26,748	26,266	23,693
Operating profit
Operating profit		2,799	2,843	2,521
Missiles and Fire Control
Net sales
Net sales		11,693	11,257	10,131
Missiles and Fire Control | Operating Segments
Net sales
Net sales		11,693	11,257	10,131
Operating profit
Operating profit		1,648	1,545	1,441
Rotary and Mission Systems
Net sales
Net sales		16,789	15,995	15,128
Rotary and Mission Systems | Operating Segments
Net sales
Net sales		16,789	15,995	15,128
Operating profit
Operating profit		1,798	1,615	1,421
Space
Net sales
Net sales		11,814	11,880	10,860
Space | Operating Segments
Net sales
Net sales		11,814	11,880	10,860
Operating profit
Operating profit		$ 1,134	$ 1,149	$ 1,191