Inventories (Tables)

9 Months Ended

Sep. 30, 2017

Inventory Disclosure [Abstract]

Schedule of Inventory Components

	September 30, 2017		December 31, 2016
Finished goods	$	651	$	625
Work-in-process		1,332		1,144
Purchased raw materials		386		408
Operating supplies		84		76
Total inventories	$	2,453	$	2,253