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Borrowings and Other Obligations (Tables)
6 Months Ended
Jun. 30, 2020
Debt Disclosure [Abstract]  
Schedule of Short-term Debt and Other Debt Obligations
(Dollars in millions)6/30/202012/31/2019
Finance Lease Current Portion$ $10  
Other Short-term Loans24   
Short-term Borrowings$32  $13  
Long-term Debt$2,148  $2,151  
Fair Value,of Short and Long-term Borrowings
(Dollars in millions)6/30/202012/31/2019
Fair Value$1,461  $2,252  
Carrying Value2,098  2,097