Property, Plant And Equipment (Tables)

6 Months Ended

Jun. 30, 2018

Property, Plant And Equipment [Abstract]

Property, Plant And Equipment, Net

($ in millions)	June 30, 2018		December 31, 2017
Property, plant and equipment	$	27,085	$	26,496
Less:  Accumulated depreciation		(12,803)		(12,119)
Property, plant and equipment, net	$	14,282	$	14,377

Schedule Of Depreciation Expense

	For the three months ended June 30,				For the six months ended June 30,
($ in millions)	2018		2017		2018		2017
Depreciation expense	$	343	$	379	$	688	$	755