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Long-Term Financing Receivables (Tables)
 3 Months Ended
Mar. 31, 2020
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 March 31, 2020 and December 31, 2019:
(dollars in millions)March 31, 2020December 31, 2019
Long-term trade accounts receivable$251  $251  
Notes and leases receivable261  265  
Total long-term receivables$512  $516