Segment Information (Unaudited) Sales by Customer Type (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue, Major Customer [Line Items]
Revenues	$ 10,133	$ 9,301
Sales percentage	100.00%	100.00%
US Government
Revenue, Major Customer [Line Items]
Revenues	$ 8,844	$ 8,012
Sales percentage	87.00%	86.00%
US Government | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 2,525	$ 2,108
Sales percentage	85.00%	84.00%
US Government | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 930	$ 803
Sales percentage	66.00%	59.00%
US Government | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 1,912	$ 1,935
Sales percentage	72.00%	75.00%
US Government | Space Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 3,477	$ 3,166
Sales percentage	95.00%	95.00%
International(2)
Revenue, Major Customer [Line Items]
Revenues	$ 1,162	$ 1,166
Sales percentage	12.00%	13.00%
International(2) | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 381	$ 331
Sales percentage	13.00%	13.00%
International(2) | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 262	$ 388
Sales percentage	19.00%	28.00%
International(2) | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 454	$ 376
Sales percentage	17.00%	15.00%
International(2) | Space Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 65	$ 71
Sales percentage	2.00%	2.00%
Other Customers [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 127	$ 123
Sales percentage	1.00%	1.00%
Other Customers [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 4	$ 11
Sales percentage	0.00%	0.00%
Other Customers [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 21	$ 16
Sales percentage	1.00%	1.00%
Other Customers [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 16	$ 15
Sales percentage	1.00%	1.00%
Other Customers [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 86	$ 81
Sales percentage	2.00%	2.00%
Intersegment Sales [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 59	$ 65
Sales percentage	2.00%	3.00%
Intersegment Sales [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 199	$ 169
Sales percentage	14.00%	12.00%
Intersegment Sales [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 277	$ 237
Sales percentage	10.00%	9.00%
Intersegment Sales [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 27	$ 32
Sales percentage	1.00%	1.00%
Operating Segments [Member] | Aeronautics Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 2,969	$ 2,515
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Defense Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 1,412	$ 1,376
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Mission Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 2,659	$ 2,563
Sales percentage	100.00%	100.00%
Operating Segments [Member] | Space Systems [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 3,655	$ 3,350
Sales percentage	100.00%	100.00%