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Variable Interest Entities (Tables)
3 Months Ended
Mar. 31, 2019
Variable Interest Entity, Primary Beneficiary  
Variable Interest Entity [Line Items]  
Schedule of Variable Interest Entities [Table Text Block]
The carrying amounts and classification of assets and liabilities for variable interest entities in our Condensed Consolidated Balance Sheet are as follows:
(dollars in millions)
March 31, 2019
 
December 31, 2018
Current assets
$
4,649

 
$
4,732

Noncurrent assets
1,728

 
1,600

Total assets
$
6,377

 
$
6,332

 
 
 
 
Current liabilities
$
4,676

 
$
4,946

Noncurrent liabilities
1,943

 
1,898

Total liabilities
$
6,619

 
$
6,844