Segment Information (Unaudited) Sales by Customer Type (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue, Major Customer [Line Items]
Sales	$ 9,301	$ 8,797
Sales percentage	100.00%	100.00%
US Government
Revenue, Major Customer [Line Items]
Sales	$ 8,012	$ 7,569
Sales percentage	86.00%	86.00%
US Government | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,108	$ 2,292
Sales percentage	84.00%	85.00%
US Government | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 803	$ 775
Sales percentage	59.00%	60.00%
US Government | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 1,935	$ 1,794
Sales percentage	75.00%	72.00%
US Government | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 3,166	$ 2,708
Sales percentage	95.00%	94.00%
International(2)
Revenue, Major Customer [Line Items]
Sales	$ 1,166	$ 1,141
Sales percentage	13.00%	13.00%
International(2) | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 331	$ 343
Sales percentage	13.00%	13.00%
International(2) | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 388	$ 293
Sales percentage	28.00%	23.00%
International(2) | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 376	$ 433
Sales percentage	15.00%	17.00%
International(2) | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 71	$ 72
Sales percentage	2.00%	3.00%
Other Customers [Member]
Revenue, Major Customer [Line Items]
Sales	$ 123	$ 87
Sales percentage	1.00%	1.00%
Other Customers [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 11	$ 3
Sales percentage	0.00%	0.00%
Other Customers [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 16	$ 16
Sales percentage	1.00%	1.00%
Other Customers [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 15	$ 24
Sales percentage	1.00%	1.00%
Other Customers [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 81	$ 44
Sales percentage	2.00%	2.00%
Intersegment Sales [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 65	$ 65
Sales percentage	3.00%	2.00%
Intersegment Sales [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 169	$ 199
Sales percentage	12.00%	16.00%
Intersegment Sales [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 237	$ 246
Sales percentage	9.00%	10.00%
Intersegment Sales [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 32	$ 31
Sales percentage	1.00%	1.00%
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,515	$ 2,703
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 1,376	$ 1,283
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,563	$ 2,497
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 3,350	$ 2,855
Sales percentage	100.00%	100.00%