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Variable Interest Entities (Tables)
12 Months Ended
Dec. 31, 2016
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 Consolidated Balance Sheet as of December 31, 2016 and 2015 are as follows:
(dollars in millions)
2016
 
2015
Current assets
$
2,722

 
$
1,920

Noncurrent assets
1,334

 
1,102

Total assets
$
4,056

 
$
3,022

Current liabilities
$
2,422

 
$
1,931

Noncurrent liabilities
1,636

 
1,355

Total liabilities
$
4,058

 
$
3,286