Inventories (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

(In millions)	September 30, 2018		December 31, 2017
Finished products	$	3,681	$	4,500
Semi-finished products	1,810		2,769
Raw materials	508		371
Stores and supplies	338		447
Total	$	6,337	$	8,087
Adjustment of inventories to a last-in, first out ("LIFO") basis	515		546
Total inventories	$	6,852	$	8,633