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Long-Term Financing Receivables (Tables)
6 Months Ended
Jun. 30, 2019
Receivables [Abstract]  
Financing Receivable Credit Quality Indicators [Table Text Block] The following table summarizes the balance by class of aerospace business related long-term receivables as of June 30, 2019 and December 31, 2018:
(dollars in millions)
June 30, 2019
 
December 31, 2018
Long-term trade accounts receivable
$
294

 
$
269

Notes and leases receivable
256

 
258

Total long-term receivables
$
550

 
$
527