Inventories (Tables)

6 Months Ended

Jun. 30, 2016

Inventory Disclosure [Abstract]

Inventories

($ in millions)	June 30, 2016		December 31, 2015
Finished products	$	1,148	$	1,082
Work in process	179		160
Raw materials	430		413
Supplies	46		50
Total Inventories	$	1,803	$	1,705