Segment Operating Results (Table) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Sales and Service Revenues
Sales and service revenue	$ 1,745	$ 1,719	$ 3,315	$ 3,313
Operating Income (Loss)
Operating income (loss)	269	181	425	340
Operating Segments
Operating Income (Loss)
Operating income (loss)	243	163	371	300
Ingalls
Sales and Service Revenues
Sales and service revenue	546	572	1,015	1,119
Operating Income (Loss)
Operating income (loss)	198	59	243	102
Newport News
Sales and Service Revenues
Sales and service revenue	1,166	1,129	2,227	2,176
Operating Income (Loss)
Operating income (loss)	109	104	202	198
Other segment
Sales and Service Revenues
Sales and service revenue	35	20	75	20
Operating Income (Loss)
Operating income (loss)	(64)		(74)
Intersegment Elimination
Sales and Service Revenues
Sales and service revenue	(2)	(2)	(2)	(2)
Non-segment factors affecting operating income (loss)
Non-segment factors affecting operating income (loss)
FAS/CAS Adjustment	28	21	55	43
Deferred state income taxes	$ (2)	$ (3)	$ (1)	$ (3)