Property, Plant And Equipment (Tables)

9 Months Ended

Sep. 30, 2018

Property, Plant And Equipment [Abstract]

Property, Plant And Equipment, Net

($ in millions)	September 30, 2018		December 31, 2017
Property, plant and equipment	$	27,391	$	26,496
Less:  Accumulated depreciation		(13,123)		(12,119)
Property, plant and equipment, net	$	14,268	$	14,377

Schedule Of Depreciation Expense

	For the three months ended September 30,				For the nine months ended September 30,
($ in millions)	2018		2017		2018		2017
Depreciation expense	$	337	$	376	$	1,025	$	1,131