Inventories (Tables)

9 Months Ended

Sep. 30, 2015

Inventory Disclosure [Abstract]

Inventories

Inventories include:

($ in millions)	September 30, 2015		December 31, 2014
Finished products	$	1,182	$	1,169
Work in process	165		157
Raw materials	441		439
Supplies	53		60
Total	$	1,841	$	1,825