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Supplemental Cash Flow Information
 12 Months Ended
Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information
Supplemental Cash Flow Information
Cash payments for interest costs and income taxes consist of the following:
 
Years Ended December 31,
 
2017
 
2016
 
2015
Interest costs (none capitalized)
$
2,571

 
$
1,761

 
$
1,204

Income taxes
$
99

 
$
102

 
$
68


Non-cash investing items consist of the following:
 
Years Ended December 31,
 
2017
 
2016
 
2015
Subvention receivable from GM
$
306

 
$
347

 
$
362

Commercial loan funding payable to GM(a)
$
90

 
$
320

 
$
303


_________________
(a)
Refer to Note 3 for further information.