Inventories, net (Tables)

12 Months Ended

Dec. 31, 2015

Inventories, net

Inventories, net

	December 31,
($ in millions)	2015			2014
Raw materials		1,793			2,105
Work in process		1,574			1,761
Finished goods		1,442			1,572
Advances to suppliers		188			253
		4,997			5,691
Advance payments consumed		(240	)		(315	)
Total		4,757			5,376