Goodwill and Other Intangible Assets
 3 Months Ended
Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets [Text Block]
Goodwill and Other Intangible Assets

Goodwill — The change in the carrying amount of goodwill in 2018 is due to currency fluctuation.

Changes in the carrying amount of goodwill by segment — 
 
Light Vehicle
 
Commercial Vehicle
 
Off-Highway
 
Power Technologies
 
Total
Balance, December 31, 2017
$
3

 
$
8

 
$
110

 
$
6

 
$
127

Currency impact

 

 
3

 

 
3

Balance, March 31, 2018
$
3

 
$
8

 
$
113

 
$
6

 
$
130


Components of other intangible assets — 
 
 
 
March 31, 2018
 
December 31, 2017
 
Weighted Average
Useful Life
(years)
 
Gross
Carrying
Amount
 
Accumulated Impairment and
Amortization
 
Net
Carrying
Amount
 
Gross
Carrying
Amount
 
Accumulated Impairment and
Amortization
 
Net
Carrying
Amount
Amortizable intangible assets
 
 
 

 
 

 
 

 
 

 
 

 
 

Core technology
7
 
$
96

 
$
(90
)
 
$
6

 
$
95

 
$
(88
)
 
$
7

Trademarks and trade names
16
 
18

 
(3
)
 
15

 
17

 
(2
)
 
15

Customer relationships
8
 
474

 
(408
)
 
66

 
470

 
(403
)
 
67

Non-amortizable intangible assets
 
 
 
 
 
 
 
 
 
 
 
 
 
Trademarks and trade names
 
 
65

 


 
65

 
65

 


 
65

Used in research and development activities
 
 
20

 


 
20

 
20

 


 
20

 
 
 
$
673

 
$
(501
)
 
$
172

 
$
667

 
$
(493
)
 
$
174



The net carrying amounts of intangible assets, other than goodwill, attributable to each of our operating segments at March 31, 2018 were as follows: Light Vehicle — $51, Commercial Vehicle — $34, Off-Highway — $78 and Power Technologies — $9.

Amortization expense related to amortizable intangible assets — 
 
Three Months Ended 
 March 31,
 
2018
 
2017
Charged to cost of sales
$
1

 
$
1

Charged to amortization of intangibles
2

 
2

Total amortization
$
3

 
$
3



The following table provides the estimated aggregate pre-tax amortization expense related to intangible assets for each of the next five years based on March 31, 2018 exchange rates. Actual amounts may differ from these estimates due to such factors as currency translation, customer turnover, impairments, additional intangible asset acquisitions and other events.
 
Remainder of 2018
 
2019
 
2020
 
2021
 
2022
Amortization expense
$
7

 
$
8

 
$
7

 
$
7

 
$
7