Segment Information Sales by Customer Type (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue, Major Customer [Line Items]
Sales	$ 35,667	$ 36,799	$ 33,841
Sales percentage	100.00%	100.00%	100.00%
US Government
Revenue, Major Customer [Line Items]
Sales	$ 30,334	$ 30,903	$ 27,934
Sales percentage	85.00%	84.00%	83.00%
US Government | Aeronautics Systems
Revenue, Major Customer [Line Items]
Sales	$ 9,631	$ 10,411	$ 9,258
Sales percentage	85.00%	86.00%	83.00%
US Government | Defense Systems
Revenue, Major Customer [Line Items]
Sales	$ 3,595	$ 5,103	$ 4,952
Sales percentage	62.00%	68.00%	66.00%
US Government | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 7,223	$ 7,279	$ 6,765
Sales percentage	71.00%	72.00%	72.00%
US Government | Space Systems
Revenue, Major Customer [Line Items]
Sales	$ 9,885	$ 8,110	$ 6,959
Sales percentage	93.00%	93.00%	94.00%
International
Revenue, Major Customer [Line Items]
Sales	$ 4,982	$ 5,188	$ 5,154
Sales percentage	14.00%	14.00%	15.00%
International | Aeronautics Systems
Revenue, Major Customer [Line Items]
Sales	$ 1,421	$ 1,595	$ 1,688
Sales percentage	13.00%	13.00%	15.00%
International | Defense Systems
Revenue, Major Customer [Line Items]
Sales	$ 1,317	$ 1,317	$ 1,442
Sales percentage	23.00%	17.00%	19.00%
International | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 1,846	$ 1,945	$ 1,839
Sales percentage	18.00%	19.00%	19.00%
International | Space Systems
Revenue, Major Customer [Line Items]
Sales	$ 398	$ 331	$ 185
Sales percentage	4.00%	4.00%	2.00%
Other Customers
Revenue, Major Customer [Line Items]
Sales	$ 351	$ 708	$ 753
Sales percentage	1.00%	2.00%	2.00%
Other Customers | Aeronautics Systems
Revenue, Major Customer [Line Items]
Sales	$ 18	$ 41	$ 67
Sales percentage	0.00%	0.00%	1.00%
Other Customers | Defense Systems
Revenue, Major Customer [Line Items]
Sales	$ 75	$ 395	$ 410
Sales percentage	1.00%	5.00%	6.00%
Other Customers | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 72	$ 77	$ 78
Sales percentage	1.00%	1.00%	1.00%
Other Customers | Space Systems
Revenue, Major Customer [Line Items]
Sales	$ 186	$ 195	$ 198
Sales percentage	2.00%	2.00%	3.00%
Intersegment Sales [Member] | Aeronautics Systems
Revenue, Major Customer [Line Items]
Sales	$ 189	$ 122	$ 103
Sales percentage	2.00%	1.00%	1.00%
Intersegment Sales [Member] | Defense Systems
Revenue, Major Customer [Line Items]
Sales	$ 789	$ 728	$ 691
Sales percentage	14.00%	10.00%	9.00%
Intersegment Sales [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 993	$ 779	$ 728
Sales percentage	10.00%	8.00%	8.00%
Intersegment Sales [Member] | Space Systems
Revenue, Major Customer [Line Items]
Sales	$ 139	$ 108	$ 83
Sales percentage	1.00%	1.00%	1.00%
Operating Segments [Member] | Aeronautics Systems
Revenue, Major Customer [Line Items]
Sales	$ 11,259	$ 12,169	$ 11,116
Sales percentage	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems
Revenue, Major Customer [Line Items]
Sales	$ 5,776	$ 7,543	$ 7,495
Sales percentage	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 10,134	$ 10,080	$ 9,410
Sales percentage	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems
Revenue, Major Customer [Line Items]
Sales	$ 10,608	$ 8,744	$ 7,425
Sales percentage	100.00%	100.00%	100.00%