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Goodwill and Other Intangibles (CenterPoint Energy and CERC)
6 Months Ended
Jun. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangibles (CenterPoint Energy and CERC) [Text Block]
Goodwill and Other Intangibles (CenterPoint Energy and CERC)

CenterPoint Energy’s and CERC’s goodwill by reportable business segment as of both June 30, 2018 and December 31, 2017 is as follows:
 
(in millions)
Natural Gas Distribution
$
746

Energy Services (1)
110

Other Operations
11

Total
$
867


(1) Amount presented is net of the accumulated goodwill impairment charge of $252 million recorded in 2012.

The tables below present information on CenterPoint Energy’s and CERC’s other intangible assets recorded in Other non-current assets on the Condensed Consolidated Balance Sheets.
 
 
 
June 30, 2018
 
December 31, 2017
 
Useful Lives
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Balance
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Balance
 
(in years)
 
(in millions)
Customer relationships
15
 
$
86

 
$
(25
)
 
$
61

 
$
86

 
$
(21
)
 
$
65

Covenants not to compete
4
 
4

 
(2
)
 
2

 
4

 
(2
)
 
2

Other
Various
 
15

 
(9
)
 
6

 
15

 
(8
)
 
7

Total
 
 
$
105

 
$
(36
)
 
$
69

 
$
105

 
$
(31
)
 
$
74


 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
 
(in millions)
Amortization expense of intangible assets
$
2

 
$
1

 
$
5

 
$
3