Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2017

Supplemental Cash Flow Elements [Abstract]

Cash Payments for Interest Costs and Income Taxes

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

Noncash Activity

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

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(a) Refer to Note 3 for further information.