Revenue (Table) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Sales and service revenues	$ 11,535	$ 11,454	$ 10,676
Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	11,535	11,454	10,676
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	(138)	(130)	(133)
Fixed-price Contract [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	357	328	299
Fixed-price incentive [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	5,553	5,867	5,378
Cost-type [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	5,448	5,045	4,730
Time-and-materials Contract [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	177	214	269
U.S. Federal Government [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	11,527	11,430	10,625
Commercial [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	7	23	50
State and Local Government agency [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	1	1	1
Product [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	7,464	7,664	7,283
Product [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	7,464	7,664	7,283
Service [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	4,071	3,790	3,393
Service [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	4,071	3,790	3,393
Ingalls [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	2,767	2,752	2,570
Ingalls [Member] \| Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	8	9	12
Ingalls [Member] \| Amphibious assault ships [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	1,426	1,511	1,415
Ingalls [Member] \| Surface combatants and coast guard cutters [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	1,330	1,225	1,138
Ingalls [Member] \| Other programs [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	11	16	17
Ingalls [Member] \| Fixed-price Contract [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	7	2	8
Ingalls [Member] \| Fixed-price incentive [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	2,417	2,497	2,369
Ingalls [Member] \| Cost-type [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	335	244	181
Ingalls [Member] \| U.S. Federal Government [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	2,759	2,743	2,558
Ingalls [Member] \| Product [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	2,424	2,495	2,372
Ingalls [Member] \| Service [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	335	248	186
Newport News Shipbuilding [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	5,969	6,133	5,852
Newport News Shipbuilding [Member] \| Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	3	3	5
Newport News Shipbuilding [Member] \| Aircraft carriers [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	3,239	3,374	3,203
Newport News Shipbuilding [Member] \| Submarines [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	2,206	2,161	2,002
Newport News Shipbuilding [Member] \| Other programs [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	524	598	647
Newport News Shipbuilding [Member] \| Fixed-price Contract [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	7	4	14
Newport News Shipbuilding [Member] \| Fixed-price incentive [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	3,127	3,364	3,009
Newport News Shipbuilding [Member] \| Cost-type [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	2,832	2,762	2,824
Newport News Shipbuilding [Member] \| U.S. Federal Government [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	5,964	6,129	5,846
Newport News Shipbuilding [Member] \| Commercial [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	2	1	1
Newport News Shipbuilding [Member] \| Product [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	4,921	5,053	4,821
Newport News Shipbuilding [Member] \| Service [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	1,045	1,077	1,026
Mission Technologies [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	2,937	2,699	2,387
Mission Technologies [Member] \| Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	127	118	116
Mission Technologies [Member] \| C5ISR, CEW&S, LVC [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	2,458	2,232	1,950
Mission Technologies [Member] \| Other programs [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	479	467	437
Mission Technologies [Member] \| Fixed-price Contract [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	343	322	277
Mission Technologies [Member] \| Fixed-price incentive [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	9	6
Mission Technologies [Member] \| Cost-type [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	2,281	2,039	1,725
Mission Technologies [Member] \| Time-and-materials Contract [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	177	214	269
Mission Technologies [Member] \| U.S. Federal Government [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	2,804	2,558	2,221
Mission Technologies [Member] \| Commercial [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	5	22	49
Mission Technologies [Member] \| State and Local Government agency [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	1	1	1
Mission Technologies [Member] \| Product [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	119	116	90
Mission Technologies [Member] \| Service [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Sales and service revenues	$ 2,691	$ 2,465	$ 2,181