Property, Plant And Equipment (Tables)

3 Months Ended

Mar. 31, 2016

Property, Plant And Equipment [Abstract]

Property, Plant And Equipment, Net

($ in millions)	March 31, 2016		December 31, 2015
Property, plant and equipment	$	18,035	$	17,801
Less:  Accumulated depreciation		(9,540)		(9,308)
Property, plant and equipment, net	$	8,495	$	8,493