Inventories (Tables)

9 Months Ended

Sep. 30, 2016

Inventory Disclosure [Abstract]

Components of Inventories [Table Text Block]

	September 30, 2016
	GMNA		GME		GMIO		GMSA		Total
Total productive material, supplies and work in process	$	3,648	$	720	$	1,100	$	841	$	6,309
Finished product, including service parts	4,497		2,470		1,322		829		9,118
Total inventories	$	8,145	$	3,190	$	2,422	$	1,670	$	15,427

	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