Segment Information (Unaudited) Sales by Customer Type (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue, Major Customer [Line Items]
Sales	$ 9,576	$ 8,801	$ 18,877	$ 17,598
Sales percentage	100.00%	100.00%	100.00%	100.00%
US Government
Revenue, Major Customer [Line Items]
Sales	$ 8,254	$ 7,508	$ 16,266	$ 15,077
Sales percentage	86.00%	85.00%	86.00%	86.00%
US Government | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,215	$ 2,134	$ 4,323	$ 4,426
Sales percentage	86.00%	84.00%	85.00%	85.00%
US Government | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 848	$ 774	$ 1,651	$ 1,549
Sales percentage	60.00%	61.00%	59.00%	61.00%
US Government | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 1,877	$ 1,802	$ 3,812	$ 3,596
Sales percentage	71.00%	72.00%	73.00%	72.00%
US Government | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 3,314	$ 2,798	$ 6,480	$ 5,506
Sales percentage	95.00%	94.00%	95.00%	94.00%
International(2)
Revenue, Major Customer [Line Items]
Sales	$ 1,202	$ 1,155	$ 2,368	$ 2,296
Sales percentage	13.00%	13.00%	13.00%	13.00%
International(2) | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 308	$ 328	$ 639	$ 671
Sales percentage	12.00%	13.00%	12.00%	13.00%
International(2) | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 357	$ 328	$ 745	$ 621
Sales percentage	25.00%	25.00%	27.00%	24.00%
International(2) | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 454	$ 415	$ 830	$ 848
Sales percentage	17.00%	16.00%	16.00%	17.00%
International(2) | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 83	$ 84	$ 154	$ 156
Sales percentage	2.00%	3.00%	2.00%	3.00%
Other Customers [Member]
Revenue, Major Customer [Line Items]
Sales	$ 120	$ 138	$ 243	$ 225
Sales percentage	1.00%	2.00%	1.00%	1.00%
Other Customers [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 8	$ 14	$ 19	$ 17
Sales percentage	0.00%	1.00%	0.00%	0.00%
Other Customers [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 20	$ 18	$ 36	$ 34
Sales percentage	1.00%	1.00%	1.00%	1.00%
Other Customers [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 27	$ 40	$ 42	$ 64
Sales percentage	1.00%	2.00%	1.00%	1.00%
Other Customers [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 65	$ 66	$ 146	$ 110
Sales percentage	2.00%	2.00%	2.00%	2.00%
Intersegment Sales [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 64	$ 58	$ 129	$ 123
Sales percentage	2.00%	2.00%	3.00%	2.00%
Intersegment Sales [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 195	$ 174	$ 364	$ 373
Sales percentage	14.00%	13.00%	13.00%	14.00%
Intersegment Sales [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 283	$ 259	$ 520	$ 505
Sales percentage	11.00%	10.00%	10.00%	10.00%
Intersegment Sales [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 26	$ 31	$ 58	$ 62
Sales percentage	1.00%	1.00%	1.00%	1.00%
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,595	$ 2,534	$ 5,110	$ 5,237
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 1,420	$ 1,294	$ 2,796	$ 2,577
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 2,641	$ 2,516	$ 5,204	$ 5,013
Sales percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Sales	$ 3,488	$ 2,979	$ 6,838	$ 5,834
Sales percentage	100.00%	100.00%	100.00%	100.00%