Segment Information (Segment Reporting Information) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenue		$ 38,469	$ 37,925	$ 39,350
Operating Earnings		4,163	4,133	4,570
Identifiable Assets		50,073	51,308	49,349
Capital Expenditures		887	967	987
Depreciation and Amortization		890	878	829
U.S. Government
Segment Reporting Information [Line Items]
Revenue		26,846	26,303	25,807
Aerospace
Segment Reporting Information [Line Items]
Revenue		8,135	8,075	9,801
Aerospace | U.S. Government
Segment Reporting Information [Line Items]
Revenue		339	513	498
Marine Systems
Segment Reporting Information [Line Items]
Revenue		10,526	9,979	9,183
Marine Systems | U.S. Government
Segment Reporting Information [Line Items]
Revenue		10,517	9,871	9,027
Combat Systems
Segment Reporting Information [Line Items]
Revenue		7,351	7,223	7,007
Combat Systems | U.S. Government
Segment Reporting Information [Line Items]
Revenue		4,173	4,191	4,048
Technologies
Segment Reporting Information [Line Items]
Revenue		12,457	12,648	13,359
Technologies | U.S. Government
Segment Reporting Information [Line Items]
Revenue		11,817	11,728	12,234
Operating Segments | Aerospace
Segment Reporting Information [Line Items]
Revenue		8,135	8,075	9,801
Operating Earnings		1,031	1,083	1,532
Identifiable Assets		11,748	12,050	12,324
Capital Expenditures		102	95	138
Depreciation and Amortization		205	201	178
Operating Segments | Aerospace | U.S. Government
Segment Reporting Information [Line Items]
Revenue		339	513	498
Operating Segments | Marine Systems
Segment Reporting Information [Line Items]
Revenue		10,526	9,979	9,183
Operating Earnings		874	854	785
Identifiable Assets		5,294	4,488	3,918
Capital Expenditures		573	604	449
Depreciation and Amortization		165	145	122
Operating Segments | Marine Systems | U.S. Government
Segment Reporting Information [Line Items]
Revenue		10,517	9,871	9,027
Operating Segments | Combat Systems
Segment Reporting Information [Line Items]
Revenue		7,351	7,223	7,007
Operating Earnings		1,067	1,041	996
Identifiable Assets		11,657	12,034	11,220
Capital Expenditures		100	92	109
Depreciation and Amortization		109	95	85
Operating Segments | Combat Systems | U.S. Government
Segment Reporting Information [Line Items]
Revenue		4,173	4,191	4,048
Operating Segments | Technologies
Segment Reporting Information [Line Items]
Revenue		12,457	12,648	13,359
Operating Earnings		1,275	1,211	1,311
Identifiable Assets		19,490	19,663	20,453
Capital Expenditures		111	172	222
Depreciation and Amortization		401	428	437
Operating Segments | Technologies | U.S. Government
Segment Reporting Information [Line Items]
Revenue		11,817	11,728	12,234
Corporate (b)
Segment Reporting Information [Line Items]
Revenue		0	0	0
Operating Earnings		(84)	(56)	(54)
Identifiable Assets	[1]	1,884	3,073	1,434
Capital Expenditures	[1]	1	4	69
Depreciation and Amortization	[1]	10	9	7
Corporate (b) | U.S. Government
Segment Reporting Information [Line Items]
Revenue		$ 0	$ 0	$ 0

[1] *Corporate identifiable assets are primarily cash and equivalents.