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Goodwill and Identifiable Intangible Assets
6 Months Ended
Jun. 29, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Identifiable Intangible Assets
. Goodwill and Identifiable Intangible Assets
Goodwill. In accordance with the accounting standards for business combinations, the Company records the assets acquired and liabilities assumed based on their estimated fair values at the date of acquisition (commonly referred to as the purchase price allocation). The table below presents the changes in goodwill allocated to the Company’s reporting units in each reportable segment.
 
Electronic Systems
 
Aerospace Systems
 
Communication Systems
 
Sensor Systems
 
Consolidated Total
 
(in millions)
Goodwill
$
2,856

 
$
1,146

 
$
1,058

 
$
1,659

 
$
6,719

Accumulated impairment losses
(43
)
 

 
(35
)
 
(26
)
 
(104
)
December 31, 2017
2,813


1,146


1,023


1,633


6,615

Business acquisitions (1)
16

 

 

 
43

 
59

Foreign currency translation adjustments
(15
)
 
(3
)
 

 
(5
)
 
(23
)
June 29, 2018
2,814


1,143


1,023


1,671


6,651

Goodwill
2,857

 
1,143

 
1,058

 
1,697

 
6,755

Accumulated impairment losses
(43
)
 

 
(35
)
 
(26
)
 
(104
)
 
$
2,814


$
1,143


$
1,023


$
1,671


$
6,651

__________________
(1) 
The increase for the Electronic Systems segment was due to the acquisition of the Latitude Engineering business and the purchase price allocation adjustments for the Doss Aviation and G-Air business acquisitions. The increase for the Sensor Systems segment was due to the acquisition of the Applied Defense Solutions business and the purchase price allocation adjustments for the Adaptive Methods and Kigre business acquisitions.
Identifiable Intangible Assets. The most significant identifiable intangible asset that is separately recognized for the Company’s business acquisitions is customer contractual relationships. All of the Company’s customer relationships are established through written customer contracts (revenue arrangements). The fair value for customer contractual relationships is determined, as of the date of acquisition, based on estimates and judgments regarding expectations for the estimated future after-tax earnings and cash flows (including cash flows for working capital) arising from the follow-on sales on contract (revenue arrangement) renewals expected from the customer contractual relationships over their estimated lives, including the probability of expected future contract renewals and sales, less a contributory assets charge, all of which is discounted to present value. The Company’s indefinite-lived intangible assets include IPR&D.
The table below presents information for the Company’s identifiable intangible assets that are subject to amortization and indefinite-lived intangible assets.
 
 
 
June 29, 2018
 
December 31, 2017
 
Weighted Average Amortization Period
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
 
(in years)
 
(in millions)
Customer contractual relationships
15
 
$
406

 
$
273

 
$
133

 
$
393

 
$
257

 
$
136

Technology
10
 
190

 
121

 
69

 
189

 
114

 
75

Other
14
 
34

 
14

 
20

 
29

 
14

 
15

Total subject to amortization

 
630


408


222


611


385


226

IPR&D
indefinite
 
66

 

 
66

 
66

 

 
66

Total
 
 
$
696


$
408


$
288


$
677


$
385


$
292

The table below presents amortization expense recorded by the Company for its identifiable intangible assets.
 
Second Quarter Ended
 
First Half Ended
 
June 29,
2018
 
June 30,
2017
 
June 29, 2018
 
June 30, 2017
 
(in millions)
Amortization expense
$
11

 
$
10

 
22

 
20

Based on gross carrying amounts at June 29, 2018, the Company’s estimate of amortization expense for identifiable intangible assets for the years ending December 31, 2018 through 2022 is presented in the table below.
 
Year Ending December 31,
 
2018
 
2019
 
2020
 
2021
 
2022
 
(in millions)
Estimated amortization expense
$
44

 
$
42

 
$
33

 
$
27

 
$
23