Change in Carrying Amount of Goodwill (Table) (Details) - Jun. 30, 2015 - USD ($) $ in Millions	Total	Total
Goodwill [Roll Forward]
Goodwill beginning balance		$ 1,026
Goodwill impairment	$ (59)	(59)
Goodwill, acquisitions		5
Goodwill, adjustments		1
Goodwill ending balance	973	973
Ingalls
Goodwill [Roll Forward]
Goodwill beginning balance		175
Goodwill ending balance	175	175
Newport News
Goodwill [Roll Forward]
Goodwill beginning balance		748
Goodwill, acquisitions		5
Goodwill ending balance	753	753
Other segment
Goodwill [Roll Forward]
Goodwill beginning balance		103
Goodwill impairment	(59)	(59)
Goodwill, adjustments		1
Goodwill ending balance	$ 45	$ 45