Segment Information (Unaudited) Sales by Geographic Location (Details 4) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue, Geographic Location [Line Items]
Revenues	$ 10,423	$ 9,996	$ 30,242	$ 30,347
United States
Revenue, Geographic Location [Line Items]
Revenues	$ 8,820	$ 8,778	$ 25,952	$ 26,782
Sales percentage	85.00%	88.00%	86.00%	88.00%
Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 504	$ 378	$ 1,373	$ 1,114
Sales percentage	5.00%	4.00%	4.00%	4.00%
Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 918	$ 685	$ 2,374	$ 2,028
Sales percentage	8.00%	7.00%	8.00%	7.00%
All other
Revenue, Geographic Location [Line Items]
Revenues	$ 181	$ 155	$ 543	$ 423
Sales percentage	2.00%	1.00%	2.00%	1.00%
Aeronautics Systems [Member] | United States
Revenue, Geographic Location [Line Items]
Revenues	$ 2,536	$ 2,458	$ 7,363	$ 7,657
Sales percentage	82.00%	84.00%	82.00%	85.00%
Aeronautics Systems [Member] | Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 221	$ 200	$ 647	$ 534
Sales percentage	7.00%	7.00%	7.00%	6.00%
Aeronautics Systems [Member] | Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 321	$ 259	$ 891	$ 749
Sales percentage	10.00%	9.00%	10.00%	9.00%
Aeronautics Systems [Member] | All other
Revenue, Geographic Location [Line Items]
Revenues	$ 22	$ 11	$ 48	$ 26
Sales percentage	1.00%	0.00%	1.00%	0.00%
Aeronautics Systems [Member] | Intersegment sales
Revenue, Geographic Location [Line Items]
Revenues	$ 42	$ 33	$ 121	$ 99
Aeronautics Systems [Member] | Operating Segments [Member]
Revenue, Geographic Location [Line Items]
Revenues	3,142	2,961	9,070	9,065
Defense Systems [Member] | United States
Revenue, Geographic Location [Line Items]
Revenues	$ 1,589	$ 1,486	$ 4,693	$ 4,489
Sales percentage	79.00%	85.00%	82.00%	85.00%
Defense Systems [Member] | Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 111	$ 74	$ 271	$ 204
Sales percentage	6.00%	4.00%	5.00%	4.00%
Defense Systems [Member] | Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 251	$ 144	$ 589	$ 440
Sales percentage	12.00%	8.00%	10.00%	8.00%
Defense Systems [Member] | All other
Revenue, Geographic Location [Line Items]
Revenues	$ 57	$ 53	$ 153	$ 133
Sales percentage	3.00%	3.00%	3.00%	3.00%
Defense Systems [Member] | Intersegment sales
Revenue, Geographic Location [Line Items]
Revenues	$ 51	$ 43	$ 149	$ 130
Defense Systems [Member] | Operating Segments [Member]
Revenue, Geographic Location [Line Items]
Revenues	2,059	1,800	5,855	5,396
Mission Systems [Member] | United States
Revenue, Geographic Location [Line Items]
Revenues	$ 2,197	$ 2,121	$ 6,505	$ 6,098
Sales percentage	80.00%	83.00%	81.00%	82.00%
Mission Systems [Member] | Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 147	$ 98	$ 407	$ 346
Sales percentage	5.00%	4.00%	5.00%	5.00%
Mission Systems [Member] | Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 318	$ 246	$ 820	$ 727
Sales percentage	12.00%	10.00%	10.00%	10.00%
Mission Systems [Member] | All other
Revenue, Geographic Location [Line Items]
Revenues	$ 92	$ 83	$ 310	$ 235
Sales percentage	3.00%	3.00%	4.00%	3.00%
Mission Systems [Member] | Intersegment sales
Revenue, Geographic Location [Line Items]
Revenues	$ 339	$ 275	$ 1,015	$ 849
Mission Systems [Member] | Operating Segments [Member]
Revenue, Geographic Location [Line Items]
Revenues	3,093	2,823	9,057	8,255
Space Systems [Member] | United States
Revenue, Geographic Location [Line Items]
Revenues	$ 2,498	$ 2,713	$ 7,391	$ 8,538
Sales percentage	98.00%	98.00%	98.00%	98.00%
Space Systems [Member] | Asia/Pacific
Revenue, Geographic Location [Line Items]
Revenues	$ 25	$ 6	$ 48	$ 30
Sales percentage	1.00%	0.00%	1.00%	1.00%
Space Systems [Member] | Europe
Revenue, Geographic Location [Line Items]
Revenues	$ 28	$ 36	$ 74	$ 112
Sales percentage	1.00%	1.00%	1.00%	1.00%
Space Systems [Member] | All other
Revenue, Geographic Location [Line Items]
Revenues	$ 10	$ 8	$ 32	$ 29
Sales percentage	0.00%	1.00%	0.00%	0.00%
Space Systems [Member] | Intersegment sales
Revenue, Geographic Location [Line Items]
Revenues	$ 137	$ 107	$ 367	$ 312
Space Systems [Member] | Operating Segments [Member]
Revenue, Geographic Location [Line Items]
Revenues	$ 2,698	$ 2,870	$ 7,912	$ 9,021