Information on Business Segments - Summary of Financial Information for Each Business Segment, Intersegment Sale, Depreciation and Capital Expenditures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Capital expenditures	$ 1,522	$ 1,766	$ 1,484
PP&E depreciation and software amortization	1,079	1,019	906
Amortization of purchased intangibles	285	271	284
Total net sales	67,044	65,398	59,812
Aeronautics
Segment Reporting Information [Line Items]
Total net sales	26,748	26,266	23,693
Missiles and Fire Control
Segment Reporting Information [Line Items]
Total net sales	11,693	11,257	10,131
Rotary and Mission Systems
Segment Reporting Information [Line Items]
Total net sales	16,789	15,995	15,128
Space
Segment Reporting Information [Line Items]
Total net sales	11,814	11,880	10,860
Intersegment Eliminations
Segment Reporting Information [Line Items]
Total net sales	3,092	3,085	2,956
Intersegment Eliminations | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	219	243	217
Intersegment Eliminations | Missiles and Fire Control
Segment Reporting Information [Line Items]
Total net sales	618	562	515
Intersegment Eliminations | Rotary and Mission Systems
Segment Reporting Information [Line Items]
Total net sales	1,895	1,903	1,872
Intersegment Eliminations | Space
Segment Reporting Information [Line Items]
Total net sales	360	377	352
Operating Segments
Segment Reporting Information [Line Items]
Capital expenditures	1,365	1,639	1,356
PP&E depreciation and software amortization	956	910	836
Total net sales	67,044	65,398	59,812
Operating Segments | Aeronautics
Segment Reporting Information [Line Items]
Capital expenditures	477	534	526
PP&E depreciation and software amortization	348	348	318
Amortization of purchased intangibles	1	0	0
Total net sales	26,748	26,266	23,693
Operating Segments | Missiles and Fire Control
Segment Reporting Information [Line Items]
Capital expenditures	304	391	300
PP&E depreciation and software amortization	153	136	122
Amortization of purchased intangibles	2	2	2
Total net sales	11,693	11,257	10,131
Operating Segments | Rotary and Mission Systems
Segment Reporting Information [Line Items]
Capital expenditures	279	311	272
PP&E depreciation and software amortization	250	244	232
Amortization of purchased intangibles	232	232	232
Total net sales	16,789	15,995	15,128
Operating Segments | Space
Segment Reporting Information [Line Items]
Capital expenditures	305	403	258
PP&E depreciation and software amortization	205	182	164
Amortization of purchased intangibles	50	37	50
Total net sales	11,814	11,880	10,860
Corporate assets
Segment Reporting Information [Line Items]
Capital expenditures	157	127	128
PP&E depreciation and software amortization	$ 123	$ 109	$ 70