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Variable Interest Entities (Tables)
6 Months Ended
Jun. 30, 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)
June 30, 2019
 
December 31, 2018
Current assets
$
4,484

 
$
4,732

Noncurrent assets
1,700

 
1,600

Total assets
$
6,184

 
$
6,332

 
 
 
 
Current liabilities
$
5,121

 
$
4,946

Noncurrent liabilities
1,884

 
1,898

Total liabilities
$
7,005

 
$
6,844