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New Accounting Pronouncements (Tables)
9 Months Ended
Sep. 30, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]  
Schedule of New Accounting Pronouncements and Changes in Accounting Principles
(Dollars in millions)
Balance at January 1, 2019
Assets and Liabilities:
 
Other Non-Current Assets
$
288

Other Current Liabilities
92

Other Non-Current Liabilities
219