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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The following table summarizes the changes in the carrying amount of goodwill, by reportable segment for the years ended December 31, 2013 and 2012.
 
US
 
Andes
 
MCAC
 
EMEA
 
Asia
 
Total
Balance as of December 31, 2011
 
 
 
 
 
 
 
 
 
 
 
Goodwill
$
2,672

 
$
899

 
$
149

 
$
180

 
$
80

 
$
3,980

Accumulated impairment losses
(21
)
 
—

 
—

 
(122
)
 
(17
)
 
(160
)
Net balance
2,651

 
899

 
149

 
58

 
63

 
3,820

Impairment losses
(1,817
)
 
—

 
—

 
—

 
—

 
(1,817
)
Goodwill acquired during the year
—

 
—

 
—

 
—

 
—

(1) 
—

Foreign currency translation and other
(9
)
 
—

 
—

 
—

 
5

 
(4
)
Balance as of December 31, 2012
 
 
 
 
 
 
 
 
 
 
 
Goodwill
2,663

 
899

 
149

 
180

 
68

 
3,959

Accumulated impairment losses
(1,838
)
 
—

 
—

 
(122
)
 
—

 
(1,960
)
Net balance
825

 
899

 
149

 
58

 
68

 
1,999

Impairment losses
(314
)
 
—

 
—

 
(58
)
 
—

 
(372
)
Goodwill associated with the sale of a business
—

 
—

 
—

 
—

 
—

 
—

Foreign currency translation and other
(5
)
 
—

 
—

 
—

 
—

 
(5
)
Balance as of December 31, 2013
 
 
 
 
 
 
 
 
 
 
 
Goodwill
2,658

 
899

 
149

 
180

 
68

 
3,954

Accumulated impairment losses
(2,152
)
 
—

 
—

 
(180
)
 
—

 
(2,332
)
Net balance
$
506

 
$
899

 
$
149

 
$
—

 
$
68

 
$
1,622

_____________________________
(1)
Both the gross carrying amount and the accumulated impairment losses of the Asia generation segment have been reduced by $17 million with no impact on the net carrying amount for the segment. This relates to Chigen, which had fully impaired goodwill of $17 million and was sold during the year.
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets
The following tables summarize the balances comprising other intangible assets in the accompanying Consolidated Balance Sheets as of December 31, 2013 and 2012:
 
December 31, 2013
 
December 31, 2012
 
Gross Balance
 
Accumulated
Amortization
 
Net Balance
 
Gross Balance
 
Accumulated
Amortization
 
Net Balance
 
(in millions)
 
(in millions)
Subject to Amortization
 
 
 
 
 
 
 
 
 
 
 
Project development rights(1)
$
31

 
$
(1
)
 
$
30

 
$
32

 
$
(1
)
 
$
31

Sales concessions(2)
95

 
(45
)
 
50

 
108

 
(49
)
 
59

Contractual payment rights(3)
74

 
(33
)
 
41

 
72

 
(23
)
 
49

Management rights
37

 
(13
)
 
24

 
40

 
(14
)
 
26

Emission allowances
4

 
—

 
4

 
5

 
—

 
5

Electric security plan
—

 
—

 
—

 
87

 
(87
)
 
—

Contracts
46

 
(24
)
 
22

 
44

 
(20
)
 
24

Customer contracts and relationships
63

 
(34
)
 
29

 
66

 
(26
)
 
40

Other(4)
20

 
(3
)
 
17

 
13

 
(2
)
 
11

Subtotal
370

 
(153
)
 
217

 
467

 
(222
)
 
245

Indefinite-Lived Intangible Assets
 
 
 
 
 
 
 
 
 
 
 
Land use rights
46

 
—

 
46

 
50

 
—

 
50

Water rights
20

 
—

 
20

 
18

 
—

 
18

Trademark/Trade name
5

 
—

 
5

 
6

 
—

 
6

Other
9

 
—

 
9

 
5

 
—

 
5

Subtotal
80

 
—

 
80

 
79

 
—

 
79

Total
$
450

 
$
(153
)
 
$
297

 
$
546

 
$
(222
)
 
$
324

_____________________________
(1) 
Represent development rights, including but not limited to, land control, various permits and right to acquire equity interests in development projects resulting from asset acquisitions by our wind operations in the U.K. The balance excludes project development rights of $70 million relating to our Poland wind operations that were fully impaired in the third quarter of 2013 and subsequently sold in November 2013. See Note 23—Discontinued Operations and Held for Sale Businesses for further information.
(2)
Excludes net balance of sales concessions of $32 and $34 million as of December 31, 2013 and 2012, respectively, relating to our utility businesses in Cameroon that have been included in noncurrent assets of Discontinued Operations and Held for Sale Businesses. See Note 23—Discontinued Operations and Held for Sale Businesses for further information.
(3) 
Represent legal rights to receive system reliability payments from the regulator.
(4) 
Includes renewable energy certificates, land use rights and various other intangible assets none of which is individually significant.
Schedule of Acquired Intangible Assets By Major Class
The following table summarizes, by category, intangible assets acquired during the years ended December 31, 2013 and 2012:
 
December 31, 2013
 
Amount
 
Subject to Amortization/
Indefinite-Lived
 
Weighted Average
Amortization Period
 
Amortization
Method
 
(in millions)
 
 
 
(in years)
 
 
Renewable energy certificates
$
3

 
Subject to amortization
 
Various
 
As utilized
Other
2

 
Various
 
N/A
 
N/A
Total
$
5

 
 
 
 
 
 
 
December 31, 2012
 
Amount
 
Subject to Amortization/
Indefinite-Lived
 
Weighted Average
Amortization Period
 
Amortization
Method
 
(in millions)
 
 
 
(in years)
 
 
Renewable energy certificates
$
5

 
Subject to amortization
 
Various
 
As utilized
Water rights
13

 
Indefinite-lived
 
N/A
 
N/A
Other
1

 
Various
 
N/A
 
N/A
Total
$
19

 
 
 
 
 
 
Schedule of Expected Amortization Expense
The following table summarizes the estimated amortization expense, by intangible asset category, for 2014 through 2018:
 
Estimated amortization expense
 
2014
 
2015
 
2016
 
2017
 
2018
 
(in millions)
Customer relationships & contracts
$
5

 
$
3

 
$
3

 
$
3

 
$
3

Sales concessions
4

 
4

 
4

 
3

 
3

Contractual payment rights
2

 
2

 
2

 
2

 
2

All other
5

 
5

 
5

 
5

 
4

Total
$
16

 
$
14

 
$
14

 
$
13

 
$
12