Property, Plant And Equipment (Tables)

9 Months Ended

Sep. 30, 2015

Property, Plant And Equipment [Abstract]

Property, Plant And Equipment, Net

($ in millions)	September 30, 2015		December 31, 2014
Property, plant and equipment	$	17,522	$	16,946
Less:  Accumulated depreciation		(9,083)		(8,380)
Property, plant and equipment, net	$	8,439	$	8,566