Segment Information (Unaudited) Sales by Customer Type (Details 2) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 10,876	$ 10,351	$ 20,757	$ 19,819
US Government
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 9,227	$ 8,768	$ 17,691	$ 16,791
Sales percentage	85.00%	85.00%	85.00%	85.00%
International(2)
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 1,543	$ 1,401	$ 2,824	$ 2,687
Sales percentage	14.00%	13.00%	14.00%	13.00%
Other Customers [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 106	$ 182	$ 242	$ 341
Sales percentage	1.00%	2.00%	1.00%	2.00%
Aeronautics Systems [Member] \| US Government
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 2,809	$ 2,526	$ 5,503	$ 4,816
Sales percentage	81.00%	82.00%	82.00%	82.00%
Aeronautics Systems [Member] \| International(2)
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 652	$ 544	$ 1,192	$ 1,022
Sales percentage	19.00%	18.00%	18.00%	18.00%
Aeronautics Systems [Member] \| Other Customers [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 17	$ 6	$ 32	$ 11
Sales percentage	0.00%	0.00%	0.00%	0.00%
Aeronautics Systems [Member] \| Intersegment Sales [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 41	$ 38	$ 75	$ 79
Aeronautics Systems [Member] \| Operating Segments [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	3,519	3,114	6,802	5,928
Defense Systems [Member] \| US Government
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 1,738	$ 1,611	$ 3,329	$ 3,062
Sales percentage	85.00%	83.00%	86.00%	83.00%
Defense Systems [Member] \| International(2)
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 279	$ 305	$ 514	$ 594
Sales percentage	14.00%	16.00%	13.00%	16.00%
Defense Systems [Member] \| Other Customers [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 21	$ 22	$ 42	$ 42
Sales percentage	1.00%	1.00%	1.00%	1.00%
Defense Systems [Member] \| Intersegment Sales [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 55	$ 53	$ 107	$ 98
Defense Systems [Member] \| Operating Segments [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	2,093	1,991	3,992	3,796
Mission Systems [Member] \| US Government
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 2,180	$ 2,282	$ 4,159	$ 4,255
Sales percentage	78.00%	81.00%	79.00%	80.00%
Mission Systems [Member] \| International(2)
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 563	$ 505	$ 1,027	$ 980
Sales percentage	20.00%	18.00%	20.00%	19.00%
Mission Systems [Member] \| Other Customers [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 43	$ 29	$ 76	$ 53
Sales percentage	2.00%	1.00%	1.00%	1.00%
Mission Systems [Member] \| Intersegment Sales [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 464	$ 341	$ 849	$ 676
Mission Systems [Member] \| Operating Segments [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	3,250	3,157	6,111	5,964
Space Systems [Member] \| US Government
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 2,500	$ 2,349	$ 4,700	$ 4,658
Sales percentage	97.00%	93.00%	96.00%	93.00%
Space Systems [Member] \| International(2)
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 49	$ 47	$ 91	$ 91
Sales percentage	2.00%	2.00%	2.00%	2.00%
Space Systems [Member] \| Other Customers [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 25	$ 125	$ 92	$ 235
Sales percentage	1.00%	5.00%	2.00%	5.00%
Space Systems [Member] \| Intersegment Sales [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 179	$ 125	$ 350	$ 230
Space Systems [Member] \| Operating Segments [Member]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Revenues	$ 2,753	$ 2,646	$ 5,233	$ 5,214