Segment Information Intersegment Sales and Operating Income (Details 5) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Sales	$ 35,667	$ 36,799	$ 33,841
Intersegment sales and operating income (Table Amounts) [Abstract]
Operating income	5,651	4,065	3,969
Pre-tax gain on sale of business	2,000
Unallowable State Taxes and Transactions Costs from Divestiture	192
Intersegment sales
Segment Reporting Information [Line Items]
Sales	2,110	1,737	1,605
Intersegment sales and operating income (Table Amounts) [Abstract]
Operating income	272	216	205
Intersegment sales | Aeronautics Systems
Segment Reporting Information [Line Items]
Sales	189	122	103
Intersegment sales and operating income (Table Amounts) [Abstract]
Operating income	19	11	10
Intersegment sales | Defense Systems
Segment Reporting Information [Line Items]
Sales	789	728	691
Intersegment sales and operating income (Table Amounts) [Abstract]
Operating income	89	76	74
Intersegment sales | Mission Systems
Segment Reporting Information [Line Items]
Sales	993	779	728
Intersegment sales and operating income (Table Amounts) [Abstract]
Operating income	150	116	113
Intersegment sales | Space Systems
Segment Reporting Information [Line Items]
Sales	139	108	83
Intersegment sales and operating income (Table Amounts) [Abstract]
Operating income	$ 14	$ 13	$ 8