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, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Capital expenditures	$ 1,691	$ 1,670	$ 1,522
PP&E depreciation and software amortization	1,430	1,404	1,364
Operating Segments
Segment Reporting Information [Line Items]
Capital expenditures	1,462	1,371	1,365
PP&E depreciation and software amortization	1,032	989	956
Operating Segments | Aeronautics
Segment Reporting Information [Line Items]
Capital expenditures	535	461	477
PP&E depreciation and software amortization	416	383	348
Operating Segments | Missiles and Fire Control
Segment Reporting Information [Line Items]
Capital expenditures	252	253	304
PP&E depreciation and software amortization	175	160	153
Operating Segments | Rotary and Mission Systems
Segment Reporting Information [Line Items]
Capital expenditures	220	266	279
PP&E depreciation and software amortization	220	245	250
Operating Segments | Space
Segment Reporting Information [Line Items]
Capital expenditures	455	391	305
PP&E depreciation and software amortization	221	201	205
Corporate assets
Segment Reporting Information [Line Items]
Capital expenditures	229	299	157
PP&E depreciation and software amortization	$ 398	$ 415	$ 408