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Variable Interest Entities (Tables)
3 Months Ended
Mar. 31, 2018
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, 2018
 
December 31, 2017
Current assets
$
3,635

 
$
3,976

Noncurrent assets
1,410

 
1,534

Total assets
$
5,045

 
$
5,510

 
 
 
 
Current liabilities
$
3,577

 
$
3,601

Noncurrent liabilities
1,817

 
2,086

Total liabilities
$
5,394

 
$
5,687