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Goodwill and Acquired Intangibles
12 Months Ended
Dec. 31, 2016
Goodwill and Acquired Intangibles

Note 4 – Goodwill and Acquired Intangibles

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”).

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       

Acquired finite-lived intangible assets are amortized to expense primarily on a straight-line basis over the following estimated useful lives: customer programs, from nine to 20 years; customer relationships, from four to 10 years; technology, from five to seven years; trademarks, from two to five years; and other intangibles, from three to 10 years.

Amortization expense from continuing operations for acquired finite-lived intangible assets was $284 million, $68 million and $20 million in 2016, 2015 and 2014. Estimated future amortization expense is as follows: $318 million in 2017; $298 million in 2018; $285 million in 2019; $263 million in 2020; $256 million in 2021 and $1,786 million thereafter.