UNITEDHEALTH GROUP INC | 2013 | FY | 3

The gross carrying value, accumulated amortization and net carrying value of other intangible assets were as follows:
 
 
December 31, 2013
 
December 31, 2012
(in millions)
 
Gross Carrying Value
 
Accumulated Amortization
 
Net Carrying Value
 
Gross Carrying Value
 
Accumulated Amortization
 
Net Carrying Value
Customer-related
 
$
4,821

 
$
(2,028
)
 
$
2,793

 
$
5,229

 
$
(1,629
)
 
$
3,600

Trademarks and technology
 
433

 
(191
)
 
242

 
445

 
(146
)
 
299

Trademarks - indefinite-lived
 
589

 
—

 
589

 
611

 
—

 
611

Other
 
284

 
(64
)
 
220

 
221

 
(49
)
 
172

Total
 
$
6,127

 
$
(2,283
)
 
$
3,844

 
$
6,506

 
$
(1,824
)
 
$
4,682

us-gaap:ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock

The acquisition date fair values and weighted-average useful lives assigned to finite-lived intangible assets acquired in business combinations consisted of the following by year of acquisition:
 
 
2013
 
2012
(in millions, except years)
 
Fair Value
 
Weighted-Average Useful Life
 
Fair Value
 
Weighted-Average Useful Life
Customer-related
 
$
55

 
12 years
 
$
1,530

 
8 years
Trademarks and technology
 
27

 
12 years
 
79

 
4 years
Other
 
—

 
 
 
111

 
15 years
Total acquired finite-lived intangible assets
 
$
82

 
12 years
 
$
1,720

 
9 years

us-gaap:ScheduleOfFiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTextBlock

Changes in the carrying amount of goodwill, by reportable segment, were as follows:
(in millions)
 
UnitedHealthcare
 
OptumHealth
 
OptumInsight
 
OptumRx
 
Consolidated
Balance at January 1, 2012
 
$
17,932

 
$
2,113

 
$
3,090

 
$
840

 
$
23,975

Acquisitions
 
6,557

 
705

 
98

 
—

 
7,360

Foreign currency effects and adjustments, net
 
(30
)
 
—

 
(19
)
 
—

 
(49
)
Balance at December 31, 2012
 
24,459

 
2,818

 
3,169

 
840

 
31,286

Acquisitions
 
408

 
48

 
483

 
—

 
939

Dispositions
 
(5
)
 
—

 
—

 
—

 
(5
)
Foreign currency effects and adjustments, net
 
(611
)
 
(6
)
 
1

 
—

 
(616
)
Balance at December 31, 2013
 
$
24,251

 
$
2,860

 
$
3,653

 
$
840

 
$
31,604

us-gaap:ScheduleOfGoodwillTextBlock

 Estimated full year amortization expense relating to intangible assets for each of the next five years ending December 31 is as follows:
(in millions)
 
 
2014
 
$
500

2015
 
478

2016
 
449

2017
 
411

2018
 
332

us-gaap:ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock