Property, Plant And Equipment (Tables)

6 Months Ended

Jun. 30, 2017

Property, Plant And Equipment [Abstract]

Property, Plant And Equipment, Net

($ in millions)	June 30, 2017		December 31, 2016
Property, plant and equipment	$	25,857	$	25,541
Less:  Accumulated depreciation		(11,375)		(10,639)
Property, plant and equipment, net	$	14,482	$	14,902

Schedule Of Depreciation Expense

	For the three months ended June 30,				For the six months ended June 30,
($ in millions)	2017		2016		2017		2016
Depreciation expense	$	379	$	446	$	755	$	686