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Debt and Credit Agreements (Tables)
6 Months Ended
Jun. 30, 2020
Debt Disclosure [Abstract]  
Schedule of Activity Related to Long-Term Debt
Total activity related to long-term debt as of the end of second quarter 2020 is shown in the table below. For fair value information related to the Company's long-term debt, see Note 10, Fair Value Measurements.
(Dollars in millions)Current PortionLong-term PortionTotal
Long-term debt as of December 31, 2019$245  $15,993  $16,238  
2020 activity:
Long-term debt issued—  500  500  
Long-term debt repaid(227) —  (227) 
Reclassifications360  (360) —  
Discount, premium and other activity—  (5) (5) 
Long-term debt as of June 30, 2020$378  $16,128  $16,506