Segment Information (Unaudited) Sales by Customer Type (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue, Major Customer [Line Items]
Revenues	$ 10,423	$ 9,996	$ 30,242	$ 30,347
US Government
Revenue, Major Customer [Line Items]
Revenues	$ 8,632	$ 8,622	$ 25,423	$ 26,354
Sales percentage	83.00%	86.00%	84.00%	87.00%
International(2)
Revenue, Major Customer [Line Items]
Revenues	$ 1,603	$ 1,218	$ 4,290	$ 3,565
Sales percentage	15.00%	12.00%	14.00%	12.00%
Other Customers [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 188	$ 156	$ 529	$ 428
Sales percentage	2.00%	2.00%	2.00%	1.00%
Aeronautics Systems [Member] | US Government
Revenue, Major Customer [Line Items]
Revenues	$ 2,530	$ 2,451	$ 7,346	$ 7,641
Sales percentage	82.00%	84.00%	82.00%	85.00%
Aeronautics Systems [Member] | International(2)
Revenue, Major Customer [Line Items]
Revenues	$ 564	$ 470	$ 1,586	$ 1,309
Sales percentage	18.00%	16.00%	18.00%	15.00%
Aeronautics Systems [Member] | Other Customers [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 6	$ 7	$ 17	$ 16
Sales percentage	0.00%	0.00%	0.00%	0.00%
Aeronautics Systems [Member] | Intersegment Sales [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 42	$ 33	$ 121	$ 99
Aeronautics Systems [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Revenues	3,142	2,961	9,070	9,065
Defense Systems [Member] | US Government
Revenue, Major Customer [Line Items]
Revenues	$ 1,570	$ 1,472	$ 4,632	$ 4,435
Sales percentage	78.00%	84.00%	81.00%	84.00%
Defense Systems [Member] | International(2)
Revenue, Major Customer [Line Items]
Revenues	$ 419	$ 271	$ 1,013	$ 777
Sales percentage	21.00%	15.00%	18.00%	15.00%
Defense Systems [Member] | Other Customers [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 19	$ 14	$ 61	$ 54
Sales percentage	1.00%	1.00%	1.00%	1.00%
Defense Systems [Member] | Intersegment Sales [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 51	$ 43	$ 149	$ 130
Defense Systems [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Revenues	2,059	1,800	5,855	5,396
Mission Systems [Member] | US Government
Revenue, Major Customer [Line Items]
Revenues	$ 2,166	$ 2,093	$ 6,421	$ 6,033
Sales percentage	79.00%	82.00%	80.00%	81.00%
Mission Systems [Member] | International(2)
Revenue, Major Customer [Line Items]
Revenues	$ 557	$ 427	$ 1,537	$ 1,308
Sales percentage	20.00%	17.00%	19.00%	18.00%
Mission Systems [Member] | Other Customers [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 31	$ 28	$ 84	$ 65
Sales percentage	1.00%	1.00%	1.00%	1.00%
Mission Systems [Member] | Intersegment Sales [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 339	$ 275	$ 1,015	$ 849
Mission Systems [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Revenues	3,093	2,823	9,057	8,255
Space Systems [Member] | US Government
Revenue, Major Customer [Line Items]
Revenues	$ 2,366	$ 2,606	$ 7,024	$ 8,245
Sales percentage	93.00%	94.00%	93.00%	95.00%
Space Systems [Member] | International(2)
Revenue, Major Customer [Line Items]
Revenues	$ 63	$ 50	$ 154	$ 171
Sales percentage	2.00%	2.00%	2.00%	2.00%
Space Systems [Member] | Other Customers [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 132	$ 107	$ 367	$ 293
Sales percentage	5.00%	4.00%	5.00%	3.00%
Space Systems [Member] | Intersegment Sales [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 137	$ 107	$ 367	$ 312
Space Systems [Member] | Operating Segments [Member]
Revenue, Major Customer [Line Items]
Revenues	$ 2,698	$ 2,870	$ 7,912	$ 9,021