v3.8.0.1
Goodwill and Intangible Assets
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
Goodwill and Intangible Assets

The following table summarizes the changes in goodwill by operating segment ($ in millions):  
 
 Managed Care 
 
Specialty Services
 
Total 
Balance as of December 31, 2015
$
361

 
$
481

 
$
842

Acquisitions and purchase accounting adjustments
3,657

 
216

 
3,873

Translation impact
(3
)
 

 
(3
)
Balance as of December 31, 2016
4,015

 
697

 
4,712

Acquisitions and purchase accounting adjustments

 
37

 
37

Balance as of December 31, 2017
$
4,015

 
$
734

 
$
4,749



Goodwill was related to the acquisitions and fair value allocations discussed in Note 3, Health Net and Note 4, Acquisitions and Noncontrolling Interest.

Intangible assets at December 31, consist of the following ($ in millions):  
 
 
 
 
 
Weighted Average Life in Years
 
2017
 
2016
 
2017
 
2016
Purchased contract rights
$
1,173

 
$
1,171

 
12.6
 
12.6

Provider contracts
274

 
285

 
11.9
 
10.7

Customer relationships
22

 
22

 
8.2
 
8.2

Trade names
162

 
163

 
9.6
 
9.6

Developed technologies
109

 
110

 
5.0
 
5.0

Other Intangibles
7

 

 
2.8
 

Intangible assets
1,747

 
1,751

 
11.6
 
11.5

Less accumulated amortization:
 
 
 
 
 
 
 
Purchased contract rights
(188
)
 
(95
)
 
 
 
 
Provider contracts
(66
)
 
(55
)
 
 
 
 
Customer relationships
(21
)
 
(21
)
 
 
 
 
Trade names
(34
)
 
(17
)
 
 
 
 
Developed technologies
(40
)
 
(18
)
 
 
 
 
Total accumulated amortization
(349
)
 
(206
)
 
 
 
 
Intangible assets, net
$
1,398

 
$
1,545

 
 
 
 


Amortization expense was $156 million, $147 million and $24 million for the years ended December 31, 2017, 2016 and 2015, respectively. Estimated total amortization expense related to intangible assets for each of the five succeeding fiscal years is as follows ($ in millions):
Year
 
Expense
2018
 
$
156

2019
 
156

2020
 
154

2021
 
134

2022
 
128