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Inventories
12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]  
Inventories [Text Block]
Inventories
 
December 31, 2016
 
GMNA
 
GME
 
GMIO
 
GMSA
 
Total
Total productive material, supplies and work in process
$
3,226

 
$
684

 
$
974

 
$
759

 
$
5,643

Finished product, including service parts
4,108

 
2,229

 
1,107

 
701

 
8,145

Total inventories
$
7,334

 
$
2,913

 
$
2,081

 
$
1,460

 
$
13,788

 
December 31, 2015
 
GMNA
 
GME
 
GMIO
 
GMSA
 
Total
Total productive material, supplies and work in process
$
2,705

 
$
713

 
$
1,113

 
$
616

 
$
5,147

Finished product, including service parts
4,884

 
2,166

 
954

 
613

 
8,617

Total inventories
$
7,589

 
$
2,879

 
$
2,067

 
$
1,229

 
$
13,764