Segment Operating Results (Table) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Sales and Service Revenues
Sales and service revenue	$ 2,188	$ 2,020	$ 4,268	$ 3,894
Operating Income (Loss)
Operating income (loss)	175	257	336	448
Operating Segments
Operating Income (Loss)
Operating income (loss)	138	181	267	298
Ingalls
Sales and Service Revenues
Sales and service revenue	622	629	1,206	1,214
Operating Income (Loss)
Operating income (loss)	69	83	115	147
Newport News
Sales and Service Revenues
Sales and service revenue	1,267	1,183	2,532	2,265
Operating Income (Loss)
Operating income (loss)	70	91	148	142
Technical Solutions
Sales and Service Revenues
Sales and service revenue	336	243	593	476
Operating Income (Loss)
Operating income (loss)	(1)	7	4	9
Intersegment Elimination
Sales and Service Revenues
Sales and service revenue	(37)	(35)	(63)	(61)
Non-segment factors affecting operating income (loss)
Non-segment factors affecting operating income (loss)
Operating FAS/CAS Adjustment	$ 37	73	71	145
Non-current state income taxes		$ 3	$ (2)	$ 5