Goodwill and Acquired Intangibles (Tables)

12 Months Ended

Dec. 31, 2016

Changes in the Carrying Amount of Goodwill by Segment

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

	Aeronautics		MFC		RMS		Space      Systems		Total
Balance at December 31, 2014 (a)		$171	$	2,181	$	4,022		$1,590	$	7,964
Sikorsky acquisition		—		—		2,764		—		2,764
Other		—		17		(48)		(2)		(33)
Balance at December 31, 2015		171		2,198		6,738		1,588		10,695
Purchase accounting adjustments		—		—		78		—		78
Other		—		62		(68)		(3)		(9)
Balance at December 31, 2016		$171	$	2,260	$	6,748		$1,585	$	10,764

^(a) Includes reclassifications of goodwill among our business segments as a result of our program realignment, which occurred during the fourth quarter of 2015 (see “Note 1 – Significant Accounting Policies”).

Acquired Intangible Assets

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

	2016						2015
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Finite-Lived:
Customer programs		$3,184		$(273)		$2,911		$3,127		$ (38)		$3,089
Customer relationships		359		(92)		267		137		(59)		78
Other		111		(83)		28		111		(72)		39
Total finite-lived intangibles		3,654		(448)		3,206		3,375		(169)		3,206
Indefinite-Lived:
Trademarks		887		—		887		816		—		816
Total acquired intangibles		$4,541		$(448)		$4,093		$4,191		$(169)		$4,022