Property, Plant And Equipment (Tables)

3 Months Ended

Mar. 31, 2015

Property, Plant And Equipment [Abstract]

Property, Plant And Equipment, Net

($ in millions)	March 31, 2015		December 31, 2014
Property, plant and equipment	$	17,095	$	16,946
Less:  Accumulated depreciation		(8,617)		(8,380)
Property, plant and equipment, net	$	8,478	$	8,566