Goodwill and Acquired Intangibles (Tables)

12 Months Ended

Dec. 31, 2015

Changes in the Carrying Amount of Goodwill by Segment

The gross carrying amounts and accumulated amortization of our acquired intangible assets consisted of the following (in millions):

	2015						2014
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Finite-Lived:
Customer programs		$ 3,127		$   (38)		$ 3,089		$ —		$ —		$ —
Customer relationships		309		(166)		143		309		(123)		186
Technology		73		(37)		36		73		(21)		52
Trademarks		27		(14)		13		27		(3)		24
Other		71		(39)		32		71		(27)		44
Indefinite Lived:
Trademarks		834		—		834		18		—		18
Total acquired intangibles		$ 4,441		$ (294)		$ 4,147		$498		$(174)		$ 324

Goodwill by Segment

Changes in the Carrying Amount of Goodwill by Segment

Changes in the carrying amount of goodwill by segment were as follows (in millions):

	Aeronautics		IS&GS		MFC		MST		Space      Systems		Total
Balance at December 31, 2013 (a)		$ 167		$2,649		$2,185		$4,049		$1,298		$10,348
Acquisitions		4		378		—		—		292		674
Impairments (b)		—		(119)		—		—		—		(119)
Other		—		(10)		(4)		(27)		—		(41)
Balance at December 31, 2014		171		2,898		2,181		4,022		1,590		10,862
Sikorsky acquisition		—		—		—		2,764		—		2,764
Impairments		—		—		—		—		—		—
Other		—		(17)		17		(48)		(2)		(50)
Balance at December 31, 2015		$ 171		$2,881		$2,198		$6,738		$1,588		$13,576

^(a) Includes reclassifications of goodwill among our business segments as a result of our program realignment, which occurred during the fourth quarter of 2015 (Note 1).

^(b)  The impairment in 2014 relates to our Technical Services reporting unit within our IS&GS business segment (Note 1).